7499779947 has 48 divisors (see below), whose sum is σ = 12454131456. Its totient is φ = 4304520000.

The previous prime is 7499779919. The next prime is 7499779949.

7499779947 is a `hidden beast` number, since 7 + 499 + 7 + 7 + 99 + 47 = 666.

7499779947 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7499779947 - 2⁸ = 7499779691 is a prime.

It is a super-3 number, since 3×7499779947³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7499779949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213672 + ... + 246282.

It is an arithmetic number, because the mean of its divisors is an integer number (259461072).

Almost surely, 2^7499779947 is an apocalyptic number.

7499779947 is a deficient number, since it is larger than the sum of its proper divisors (4954351509).

7499779947 is a wasteful number, since it uses less digits than its factorization.

7499779947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32752 (or 32749 counting only the distinct ones).

The product of its digits is 252047376, while the sum is 72.

The square root of 7499779947 is about 86601.2698925368. The cubic root of 7499779947 is about 1957.4146764334.

The spelling of 7499779947 in words is "seven billion, four hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred forty-seven".