900691394 has 4 divisors (see below), whose sum is σ = 1351037094. Its totient is φ = 450345696.

The previous prime is 900691357. The next prime is 900691423. The reversal of 900691394 is 493196009.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 567154225 + 333537169 = 23815^2 + 18263^2 .

It is a super-2 number, since 2×900691394² = 1622489974451326472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225172847 + ... + 225172850.

Almost surely, 2^900691394 is an apocalyptic number.

900691394 is a deficient number, since it is larger than the sum of its proper divisors (450345700).

900691394 is a wasteful number, since it uses less digits than its factorization.

900691394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450345699.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 900691394 is about 30011.5210211012. The cubic root of 900691394 is about 965.7365559775.

The spelling of 900691394 in words is "nine hundred million, six hundred ninety-one thousand, three hundred ninety-four".