690699771 has 8 divisors (see below), whose sum is σ = 1023258960. Its totient is φ = 460466496.

The previous prime is 690699721. The next prime is 690699791. The reversal of 690699771 is 177996096.

It is not a de Polignac number, because 690699771 - 2⁹ = 690699259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690699701) 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 in 7 ways as a sum of consecutive naturals, for example, 12790710 + ... + 12790763.

It is an arithmetic number, because the mean of its divisors is an integer number (127907370).

Almost surely, 2^690699771 is an apocalyptic number.

690699771 is a deficient number, since it is larger than the sum of its proper divisors (332559189).

690699771 is a wasteful number, since it uses less digits than its factorization.

690699771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25581482 (or 25581476 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 690699771 is about 26281.1676110480. The cubic root of 690699771 is about 883.9542142874.

The spelling of 690699771 in words is "six hundred ninety million, six hundred ninety-nine thousand, seven hundred seventy-one".