472931989 has 2 divisors, whose sum is σ = 472931990. Its totient is φ = 472931988.

The previous prime is 472931969. The next prime is 472932011. The reversal of 472931989 is 989139274.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270865764 + 202066225 = 16458^2 + 14215^2 .

It is a cyclic number.

It is not a de Polignac number, because 472931989 - 2¹³ = 472923797 is a prime.

It is a super-2 number, since 2×472931989² = 447329332438992242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472931969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236465994 + 236465995.

It is an arithmetic number, because the mean of its divisors is an integer number (236465995).

Almost surely, 2^472931989 is an apocalyptic number.

It is an amenable number.

472931989 is a deficient number, since it is larger than the sum of its proper divisors (1).

472931989 is an equidigital number, since it uses as much as digits as its factorization.

472931989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 472931989 is about 21746.9995401665. Note that the first 3 decimals coincide. The cubic root of 472931989 is about 779.1114080912. Note that the first 3 decimals are identical.

The spelling of 472931989 in words is "four hundred seventy-two million, nine hundred thirty-one thousand, nine hundred eighty-nine".