1397908093 has 4 divisors (see below), whose sum is σ = 1398436480. Its totient is φ = 1397379708.

The previous prime is 1397908087. The next prime is 1397908097. The reversal of 1397908093 is 3908097931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1397908093 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 (1397908097) 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, 260205 + ... + 265522.

It is an arithmetic number, because the mean of its divisors is an integer number (349609120).

Almost surely, 2^1397908093 is an apocalyptic number.

It is an amenable number.

1397908093 is a deficient number, since it is larger than the sum of its proper divisors (528387).

1397908093 is an equidigital number, since it uses as much as digits as its factorization.

1397908093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528386.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 1397908093 is about 37388.6091343339. The cubic root of 1397908093 is about 1118.1314754660.

The spelling of 1397908093 in words is "one billion, three hundred ninety-seven million, nine hundred eight thousand, ninety-three".