47981799 has 12 divisors (see below), whose sum is σ = 69568200. Its totient is φ = 31867344.

The previous prime is 47981797. The next prime is 47981839. The reversal of 47981799 is 99718974.

47981799 is a `hidden beast` number, since 479 + 81 + 7 + 99 = 666.

It is not a de Polignac number, because 47981799 - 2¹ = 47981797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47981797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7489 + ... + 12330.

It is an arithmetic number, because the mean of its divisors is an integer number (5797350).

Almost surely, 2^47981799 is an apocalyptic number.

47981799 is a deficient number, since it is larger than the sum of its proper divisors (21586401).

47981799 is a wasteful number, since it uses less digits than its factorization.

47981799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094 (or 20091 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 47981799 is about 6926.8895617008. The cubic root of 47981799 is about 363.3781774649.

The spelling of 47981799 in words is "forty-seven million, nine hundred eighty-one thousand, seven hundred ninety-nine".