1397906611 has 4 divisors (see below), whose sum is σ = 1398980752. Its totient is φ = 1396832472.

The previous prime is 1397906593. The next prime is 1397906623. The reversal of 1397906611 is 1166097931.

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 1397906611 - 2⁹ = 1397906099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397907611) 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, 535116 + ... + 537721.

It is an arithmetic number, because the mean of its divisors is an integer number (349745188).

Almost surely, 2^1397906611 is an apocalyptic number.

1397906611 is a deficient number, since it is larger than the sum of its proper divisors (1074141).

1397906611 is a wasteful number, since it uses less digits than its factorization.

1397906611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074140.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1397906611 is about 37388.5893154583. The cubic root of 1397906611 is about 1118.1310803348.

The spelling of 1397906611 in words is "one billion, three hundred ninety-seven million, nine hundred six thousand, six hundred eleven".