697940587 has 2 divisors, whose sum is σ = 697940588. Its totient is φ = 697940586.

The previous prime is 697940539. The next prime is 697940597. The reversal of 697940587 is 785049796.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 697940587 - 2²³ = 689551979 is a prime.

It is a super-3 number, since 3×697940587³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (697940597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348970293 + 348970294.

It is an arithmetic number, because the mean of its divisors is an integer number (348970294).

Almost surely, 2^697940587 is an apocalyptic number.

697940587 is a deficient number, since it is larger than the sum of its proper divisors (1).

697940587 is an equidigital number, since it uses as much as digits as its factorization.

697940587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 697940587 is about 26418.5651957104. The cubic root of 697940587 is about 887.0324030755.

The spelling of 697940587 in words is "six hundred ninety-seven million, nine hundred forty thousand, five hundred eighty-seven".