696931421 has 2 divisors, whose sum is σ = 696931422. Its totient is φ = 696931420.

The previous prime is 696931379. The next prime is 696931427. The reversal of 696931421 is 124139696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532963396 + 163968025 = 23086^2 + 12805^2 .

It is a cyclic number.

It is not a de Polignac number, because 696931421 - 2⁶ = 696931357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696931427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348465710 + 348465711.

It is an arithmetic number, because the mean of its divisors is an integer number (348465711).

Almost surely, 2^696931421 is an apocalyptic number.

It is an amenable number.

696931421 is a deficient number, since it is larger than the sum of its proper divisors (1).

696931421 is an equidigital number, since it uses as much as digits as its factorization.

696931421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 696931421 is about 26399.4587255118. The cubic root of 696931421 is about 886.6046709972.

The spelling of 696931421 in words is "six hundred ninety-six million, nine hundred thirty-one thousand, four hundred twenty-one".