699464981 has 2 divisors, whose sum is σ = 699464982. Its totient is φ = 699464980.

The previous prime is 699464939. The next prime is 699465023. The reversal of 699464981 is 189464996.

It is a balanced prime because it is at equal distance from previous prime (699464939) and next prime (699465023).

It can be written as a sum of positive squares in only one way, i.e., 493284100 + 206180881 = 22210^2 + 14359^2 .

It is a cyclic number.

It is not a de Polignac number, because 699464981 - 2¹⁸ = 699202837 is a prime.

It is a super-2 number, since 2×699464981² = 978502519290660722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699464921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349732490 + 349732491.

It is an arithmetic number, because the mean of its divisors is an integer number (349732491).

Almost surely, 2^699464981 is an apocalyptic number.

It is an amenable number.

699464981 is a deficient number, since it is larger than the sum of its proper divisors (1).

699464981 is an equidigital number, since it uses as much as digits as its factorization.

699464981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 56.

The square root of 699464981 is about 26447.4002692136. The cubic root of 699464981 is about 887.6777319377.

The spelling of 699464981 in words is "six hundred ninety-nine million, four hundred sixty-four thousand, nine hundred eighty-one".