4631733921 has 4 divisors (see below), whose sum is σ = 6175645232. Its totient is φ = 3087822612.

The previous prime is 4631733913. The next prime is 4631733937. The reversal of 4631733921 is 1293371364.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4631733921 - 2³ = 4631733913 is a prime.

It is a super-2 number, since 2×4631733921² = 42905918229884068482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4631733921.

It is not an unprimeable number, because it can be changed into a prime (4631713921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771955651 + ... + 771955656.

It is an arithmetic number, because the mean of its divisors is an integer number (1543911308).

Almost surely, 2^4631733921 is an apocalyptic number.

It is an amenable number.

4631733921 is a deficient number, since it is larger than the sum of its proper divisors (1543911311).

4631733921 is a wasteful number, since it uses less digits than its factorization.

4631733921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543911310.

The product of its digits is 81648, while the sum is 39.

The square root of 4631733921 is about 68056.8433076351. The cubic root of 4631733921 is about 1666.9191433825.

The spelling of 4631733921 in words is "four billion, six hundred thirty-one million, seven hundred thirty-three thousand, nine hundred twenty-one".