1904123631 has 8 divisors (see below), whose sum is σ = 2545040560. Its totient is φ = 1266311232.

The previous prime is 1904123587. The next prime is 1904123651. The reversal of 1904123631 is 1363214091.

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

It is not a de Polignac number, because 1904123631 - 2⁶ = 1904123567 is a prime.

It is a super-2 number, since 2×1904123631² = 7251373604265248322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904123651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774700 + ... + 777153.

It is an arithmetic number, because the mean of its divisors is an integer number (318130070).

Almost surely, 2^1904123631 is an apocalyptic number.

1904123631 is a deficient number, since it is larger than the sum of its proper divisors (640916929).

1904123631 is a wasteful number, since it uses less digits than its factorization.

1904123631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552265.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1904123631 is about 43636.2650899455. The cubic root of 1904123631 is about 1239.4577127121.

The spelling of 1904123631 in words is "one billion, nine hundred four million, one hundred twenty-three thousand, six hundred thirty-one".