690912829 has 2 divisors, whose sum is σ = 690912830. Its totient is φ = 690912828.

The previous prime is 690912763. The next prime is 690912839. The reversal of 690912829 is 928219096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660387204 + 30525625 = 25698^2 + 5525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690912829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690912839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345456414 + 345456415.

It is an arithmetic number, because the mean of its divisors is an integer number (345456415).

Almost surely, 2^690912829 is an apocalyptic number.

It is an amenable number.

690912829 is a deficient number, since it is larger than the sum of its proper divisors (1).

690912829 is an equidigital number, since it uses as much as digits as its factorization.

690912829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 690912829 is about 26285.2207333323. The cubic root of 690912829 is about 884.0450951416.

The spelling of 690912829 in words is "six hundred ninety million, nine hundred twelve thousand, eight hundred twenty-nine".