697431121955 has 8 divisors (see below), whose sum is σ = 886147778592. Its totient is φ = 525124609408.

The previous prime is 697431121951. The next prime is 697431121963. The reversal of 697431121955 is 559121134796.

It is a happy number.

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 697431121955 - 2² = 697431121951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 697431121897 and 697431121906.

It is not an unprimeable number, because it can be changed into a prime (697431121951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4102535927 + ... + 4102536096.

It is an arithmetic number, because the mean of its divisors is an integer number (110768472324).

Almost surely, 2^697431121955 is an apocalyptic number.

697431121955 is a deficient number, since it is larger than the sum of its proper divisors (188716656637).

697431121955 is a wasteful number, since it uses less digits than its factorization.

697431121955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8205072045.

The product of its digits is 2041200, while the sum is 53.

The spelling of 697431121955 in words is "six hundred ninety-seven billion, four hundred thirty-one million, one hundred twenty-one thousand, nine hundred fifty-five".