697784890397 has 16 divisors (see below), whose sum is σ = 812791445760. Its totient is φ = 586616764032.

The previous prime is 697784890337. The next prime is 697784890399. The reversal of 697784890397 is 793098487796.

697784890397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 697784890397 - 2⁶ = 697784890333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697784890399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 777104 + ... + 1414022.

It is an arithmetic number, because the mean of its divisors is an integer number (50799465360).

Almost surely, 2^697784890397 is an apocalyptic number.

It is an amenable number.

697784890397 is a deficient number, since it is larger than the sum of its proper divisors (115006555363).

697784890397 is a wasteful number, since it uses less digits than its factorization.

697784890397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639932.

The product of its (nonzero) digits is 1152216576, while the sum is 77.

The spelling of 697784890397 in words is "six hundred ninety-seven billion, seven hundred eighty-four million, eight hundred ninety thousand, three hundred ninety-seven".