690169499 has 2 divisors, whose sum is σ = 690169500. Its totient is φ = 690169498.

The previous prime is 690169489. The next prime is 690169531. The reversal of 690169499 is 994961096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690169499 - 2⁴ = 690169483 is a prime.

It is a super-2 number, since 2×690169499² = 952667874699822002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 690169499.

It is not a weakly prime, because it can be changed into another prime (690169489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345084749 + 345084750.

It is an arithmetic number, because the mean of its divisors is an integer number (345084750).

Almost surely, 2^690169499 is an apocalyptic number.

690169499 is a deficient number, since it is larger than the sum of its proper divisors (1).

690169499 is an equidigital number, since it uses as much as digits as its factorization.

690169499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 690169499 is about 26271.0772333378. The cubic root of 690169499 is about 883.7279431952.

The spelling of 690169499 in words is "six hundred ninety million, one hundred sixty-nine thousand, four hundred ninety-nine".