697687477 has 2 divisors, whose sum is σ = 697687478. Its totient is φ = 697687476.

The previous prime is 697687399. The next prime is 697687493. The reversal of 697687477 is 774786796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695587876 + 2099601 = 26374^2 + 1449^2 .

It is a cyclic number.

It is not a de Polignac number, because 697687477 - 2⁷ = 697687349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697687777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348843738 + 348843739.

It is an arithmetic number, because the mean of its divisors is an integer number (348843739).

Almost surely, 2^697687477 is an apocalyptic number.

It is an amenable number.

697687477 is a deficient number, since it is larger than the sum of its proper divisors (1).

697687477 is an equidigital number, since it uses as much as digits as its factorization.

697687477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24893568, while the sum is 61.

The square root of 697687477 is about 26413.7743800465. The cubic root of 697687477 is about 886.9251618950.

The spelling of 697687477 in words is "six hundred ninety-seven million, six hundred eighty-seven thousand, four hundred seventy-seven".