690876919 has 2 divisors, whose sum is σ = 690876920. Its totient is φ = 690876918.

The previous prime is 690876887. The next prime is 690876973. The reversal of 690876919 is 919678096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690876919 - 2⁵ = 690876887 is a prime.

It is a super-2 number, since 2×690876919² = 954621834413865122, 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 690876919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690873919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345438459 + 345438460.

It is an arithmetic number, because the mean of its divisors is an integer number (345438460).

Almost surely, 2^690876919 is an apocalyptic number.

690876919 is a deficient number, since it is larger than the sum of its proper divisors (1).

690876919 is an equidigital number, since it uses as much as digits as its factorization.

690876919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 690876919 is about 26284.5376409782. The cubic root of 690876919 is about 884.0297788778.

The spelling of 690876919 in words is "six hundred ninety million, eight hundred seventy-six thousand, nine hundred nineteen".