690062497 has 2 divisors, whose sum is σ = 690062498. Its totient is φ = 690062496.

The previous prime is 690062467. The next prime is 690062509. The reversal of 690062497 is 794260096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374964496 + 315098001 = 19364^2 + 17751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690062497 is a prime.

It is not a weakly prime, because it can be changed into another prime (690062437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345031248 + 345031249.

It is an arithmetic number, because the mean of its divisors is an integer number (345031249).

Almost surely, 2^690062497 is an apocalyptic number.

It is an amenable number.

690062497 is a deficient number, since it is larger than the sum of its proper divisors (1).

690062497 is an equidigital number, since it uses as much as digits as its factorization.

690062497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 690062497 is about 26269.0406562554. The cubic root of 690062497 is about 883.6822705767.

The spelling of 690062497 in words is "six hundred ninety million, sixty-two thousand, four hundred ninety-seven".