472553991 has 72 divisors (see below), whose sum is σ = 862701840. Its totient is φ = 247048704.

The previous prime is 472553953. The next prime is 472553999. The reversal of 472553991 is 199355274.

It is a happy number.

472553991 is a `hidden beast` number, since 4 + 7 + 2 + 553 + 9 + 91 = 666.

It is not a de Polignac number, because 472553991 - 2¹⁰ = 472552967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472553999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 796591 + ... + 797183.

It is an arithmetic number, because the mean of its divisors is an integer number (11981970).

Almost surely, 2^472553991 is an apocalyptic number.

472553991 is a deficient number, since it is larger than the sum of its proper divisors (390147849).

472553991 is a wasteful number, since it uses less digits than its factorization.

472553991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 755 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 472553991 is about 21738.3069947961. The cubic root of 472553991 is about 778.9037805974.

The spelling of 472553991 in words is "four hundred seventy-two million, five hundred fifty-three thousand, nine hundred ninety-one".