690991742 has 8 divisors (see below), whose sum is σ = 1184557296. Its totient is φ = 296139312.

The previous prime is 690991711. The next prime is 690991757. The reversal of 690991742 is 247199096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24678263 + ... + 24678290.

It is an arithmetic number, because the mean of its divisors is an integer number (148069662).

Almost surely, 2^690991742 is an apocalyptic number.

690991742 is a deficient number, since it is larger than the sum of its proper divisors (493565554).

690991742 is a wasteful number, since it uses less digits than its factorization.

690991742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49356562.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 690991742 is about 26286.7217811579. The cubic root of 690991742 is about 884.0787510973.

The spelling of 690991742 in words is "six hundred ninety million, nine hundred ninety-one thousand, seven hundred forty-two".