672021889 has 16 divisors (see below), whose sum is σ = 874275840. Its totient is φ = 500884560.

The previous prime is 672021871. The next prime is 672021899. The reversal of 672021889 is 988120276.

It is not a de Polignac number, because 672021889 - 2⁷ = 672021761 is a prime.

It is a super-2 number, since 2×672021889² = 903226838590256642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672021809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187959 + ... + 191500.

It is an arithmetic number, because the mean of its divisors is an integer number (54642240).

Almost surely, 2^672021889 is an apocalyptic number.

It is an amenable number.

672021889 is a deficient number, since it is larger than the sum of its proper divisors (202253951).

672021889 is a wasteful number, since it uses less digits than its factorization.

672021889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379500.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 672021889 is about 25923.3849834469. The cubic root of 672021889 is about 875.9133381218.

The spelling of 672021889 in words is "six hundred seventy-two million, twenty-one thousand, eight hundred eighty-nine".