462721891 has 4 divisors (see below), whose sum is σ = 463338784. Its totient is φ = 462105000.

The previous prime is 462721879. The next prime is 462721901. The reversal of 462721891 is 198127264.

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

It is a cyclic number.

It is not a de Polignac number, because 462721891 - 2¹¹ = 462719843 is a prime.

It is a super-2 number, since 2×462721891² = 428223096821231762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (462724891) 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, 307320 + ... + 308821.

It is an arithmetic number, because the mean of its divisors is an integer number (115834696).

Almost surely, 2^462721891 is an apocalyptic number.

462721891 is a deficient number, since it is larger than the sum of its proper divisors (616893).

462721891 is an equidigital number, since it uses as much as digits as its factorization.

462721891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616892.

The product of its digits is 48384, while the sum is 40.

The square root of 462721891 is about 21510.9714099573. The cubic root of 462721891 is about 773.4638407906.

The spelling of 462721891 in words is "four hundred sixty-two million, seven hundred twenty-one thousand, eight hundred ninety-one".