697199833921 has 2 divisors, whose sum is σ = 697199833922. Its totient is φ = 697199833920.

The previous prime is 697199833901. The next prime is 697199833969. The reversal of 697199833921 is 129338991796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687332193025 + 9867640896 = 829055^2 + 99336^2 .

It is a cyclic number.

It is not a de Polignac number, because 697199833921 - 2⁹ = 697199833409 is a prime.

It is a super-3 number, since 3×697199833921³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (697199833901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348599916960 + 348599916961.

It is an arithmetic number, because the mean of its divisors is an integer number (348599916961).

Almost surely, 2^697199833921 is an apocalyptic number.

It is an amenable number.

697199833921 is a deficient number, since it is larger than the sum of its proper divisors (1).

697199833921 is an equidigital number, since it uses as much as digits as its factorization.

697199833921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 67.

The spelling of 697199833921 in words is "six hundred ninety-seven billion, one hundred ninety-nine million, eight hundred thirty-three thousand, nine hundred twenty-one".