699649877 has 2 divisors, whose sum is σ = 699649878. Its totient is φ = 699649876.

The previous prime is 699649859. The next prime is 699649879. The reversal of 699649877 is 778946996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546904996 + 152744881 = 23386^2 + 12359^2 .

It is a cyclic number.

It is not a de Polignac number, because 699649877 - 2⁶ = 699649813 is a prime.

It is a super-2 number, since 2×699649877² = 979019900772230258, which contains 22 as substring.

Together with 699649879, 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 (699649879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349824938 + 349824939.

It is an arithmetic number, because the mean of its divisors is an integer number (349824939).

Almost surely, 2^699649877 is an apocalyptic number.

It is an amenable number.

699649877 is a deficient number, since it is larger than the sum of its proper divisors (1).

699649877 is an equidigital number, since it uses as much as digits as its factorization.

699649877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41150592, while the sum is 65.

The square root of 699649877 is about 26450.8955803012. The cubic root of 699649877 is about 887.7559410483.

The spelling of 699649877 in words is "six hundred ninety-nine million, six hundred forty-nine thousand, eight hundred seventy-seven".