690969910 has 16 divisors (see below), whose sum is σ = 1297822176. Its totient is φ = 264371008.

The previous prime is 690969907. The next prime is 690969911. The reversal of 690969910 is 19969096.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690969911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501879 + ... + 1502338.

It is an arithmetic number, because the mean of its divisors is an integer number (81113886).

Almost surely, 2^690969910 is an apocalyptic number.

690969910 is a deficient number, since it is larger than the sum of its proper divisors (606852266).

690969910 is a wasteful number, since it uses less digits than its factorization.

690969910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004247.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 690969910 is about 26286.3065111856. The cubic root of 690969910 is about 884.0694401271.

The spelling of 690969910 in words is "six hundred ninety million, nine hundred sixty-nine thousand, nine hundred ten".