699661481 has 2 divisors, whose sum is σ = 699661482. Its totient is φ = 699661480.

The previous prime is 699661463. The next prime is 699661489. The reversal of 699661481 is 184166996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467251456 + 232410025 = 21616^2 + 15245^2 .

It is a cyclic number.

It is not a de Polignac number, because 699661481 - 2²² = 695467177 is a prime.

It is a super-2 number, since 2×699661481² = 979052375990226722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (699661489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349830740 + 349830741.

It is an arithmetic number, because the mean of its divisors is an integer number (349830741).

Almost surely, 2^699661481 is an apocalyptic number.

It is an amenable number.

699661481 is a deficient number, since it is larger than the sum of its proper divisors (1).

699661481 is an equidigital number, since it uses as much as digits as its factorization.

699661481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 699661481 is about 26451.1149292426. The cubic root of 699661481 is about 887.7608489617.

The spelling of 699661481 in words is "six hundred ninety-nine million, six hundred sixty-one thousand, four hundred eighty-one".