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1397000831 = 4134073191
BaseRepresentation
bin101001101000100…
…1000101001111111
310121100200222212112
41103101020221333
510330113011311
6350342324235
746422211502
oct12321105177
93540628775
101397000831
11657630446
1232ba2967b
1319356b615
14d3771139
15829a128b
hex53448a7f

1397000831 has 4 divisors (see below), whose sum is σ = 1431074064. Its totient is φ = 1362927600.

The previous prime is 1397000809. The next prime is 1397000849. The reversal of 1397000831 is 1380007931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1397000831 - 26 = 1397000767 is a prime.

It is a super-2 number, since 2×13970008312 = 3903222643629381122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397000851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17036555 + ... + 17036636.

It is an arithmetic number, because the mean of its divisors is an integer number (357768516).

Almost surely, 21397000831 is an apocalyptic number.

1397000831 is a deficient number, since it is larger than the sum of its proper divisors (34073233).

1397000831 is an equidigital number, since it uses as much as digits as its factorization.

1397000831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34073232.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1397000831 is about 37376.4742986815. The cubic root of 1397000831 is about 1117.8895287685.

The spelling of 1397000831 in words is "one billion, three hundred ninety-seven million, eight hundred thirty-one", and thus it is an aban number.

Divisors: 1 41 34073191 1397000831