696392621 has 2 divisors, whose sum is σ = 696392622. Its totient is φ = 696392620.

The previous prime is 696392603. The next prime is 696392623. The reversal of 696392621 is 126293696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648975625 + 47416996 = 25475^2 + 6886^2 .

It is a cyclic number.

It is not a de Polignac number, because 696392621 - 2¹⁴ = 696376237 is a prime.

Together with 696392623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696392623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348196310 + 348196311.

It is an arithmetic number, because the mean of its divisors is an integer number (348196311).

Almost surely, 2^696392621 is an apocalyptic number.

It is an amenable number.

696392621 is a deficient number, since it is larger than the sum of its proper divisors (1).

696392621 is an equidigital number, since it uses as much as digits as its factorization.

696392621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 696392621 is about 26389.2519977357. The cubic root of 696392621 is about 886.3761330857.

The spelling of 696392621 in words is "six hundred ninety-six million, three hundred ninety-two thousand, six hundred twenty-one".