1385997901 has 8 divisors (see below), whose sum is σ = 1397016504. Its totient is φ = 1374992640.

The previous prime is 1385997881. The next prime is 1385997931. The reversal of 1385997901 is 1097995831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80910025 + 1305087876 = 8995^2 + 36126^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385997901 - 2⁵ = 1385997869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385997931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343371 + ... + 347383.

It is an arithmetic number, because the mean of its divisors is an integer number (174627063).

Almost surely, 2^1385997901 is an apocalyptic number.

It is an amenable number.

1385997901 is a deficient number, since it is larger than the sum of its proper divisors (11018603).

1385997901 is a wasteful number, since it uses less digits than its factorization.

1385997901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671.

The product of its (nonzero) digits is 612360, while the sum is 52.

The square root of 1385997901 is about 37228.9927475885. The cubic root of 1385997901 is about 1114.9469167084.

The spelling of 1385997901 in words is "one billion, three hundred eighty-five million, nine hundred ninety-seven thousand, nine hundred one".