690769291 has 2 divisors, whose sum is σ = 690769292. Its totient is φ = 690769290.

The previous prime is 690769283. The next prime is 690769309. The reversal of 690769291 is 192967096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690769291 - 2³ = 690769283 is a prime.

It is equal to p_35799664 and since 690769291 and 35799664 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (690769201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345384645 + 345384646.

It is an arithmetic number, because the mean of its divisors is an integer number (345384646).

Almost surely, 2^690769291 is an apocalyptic number.

690769291 is a deficient number, since it is larger than the sum of its proper divisors (1).

690769291 is an equidigital number, since it uses as much as digits as its factorization.

690769291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 690769291 is about 26282.4901978485. The cubic root of 690769291 is about 883.9838704120.

The spelling of 690769291 in words is "six hundred ninety million, seven hundred sixty-nine thousand, two hundred ninety-one".