47017972 has 24 divisors (see below), whose sum is σ = 84891240. Its totient is φ = 22769280.

The previous prime is 47017969. The next prime is 47017981. The reversal of 47017972 is 27971074.

It can be written as a sum of positive squares in 4 ways, for example, as 15163236 + 31854736 = 3894^2 + 5644^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39222 + ... + 40402.

It is an arithmetic number, because the mean of its divisors is an integer number (3537135).

Almost surely, 2^47017972 is an apocalyptic number.

It is an amenable number.

47017972 is a deficient number, since it is larger than the sum of its proper divisors (37873268).

47017972 is a wasteful number, since it uses less digits than its factorization.

47017972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 47017972 is about 6856.9652179372. The cubic root of 47017972 is about 360.9286006076.

The spelling of 47017972 in words is "forty-seven million, seventeen thousand, nine hundred seventy-two".