690080401 has 2 divisors, whose sum is σ = 690080402. Its totient is φ = 690080400.

The previous prime is 690080393. The next prime is 690080441. The reversal of 690080401 is 104080096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408646225 + 281434176 = 20215^2 + 16776^2 .

It is a cyclic number.

It is not a de Polignac number, because 690080401 - 2³ = 690080393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690080401.

It is not a weakly prime, because it can be changed into another prime (690080441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345040200 + 345040201.

It is an arithmetic number, because the mean of its divisors is an integer number (345040201).

Almost surely, 2^690080401 is an apocalyptic number.

It is an amenable number.

690080401 is a deficient number, since it is larger than the sum of its proper divisors (1).

690080401 is an equidigital number, since it uses as much as digits as its factorization.

690080401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 690080401 is about 26269.3814354278. The cubic root of 690080401 is about 883.6899130297.

The spelling of 690080401 in words is "six hundred ninety million, eighty thousand, four hundred one".