47139497979 has 12 divisors (see below), whose sum is σ = 73114323624. Its totient is φ = 26936855904.

The previous prime is 47139497957. The next prime is 47139497983. The reversal of 47139497979 is 97979493174.

It is not a de Polignac number, because 47139497979 - 2¹⁵ = 47139465211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47139497939) 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, 160338282 + ... + 160338575.

It is an arithmetic number, because the mean of its divisors is an integer number (6092860302).

Almost surely, 2^47139497979 is an apocalyptic number.

47139497979 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

47139497979 is a deficient number, since it is larger than the sum of its proper divisors (25974825645).

47139497979 is a wasteful number, since it uses less digits than its factorization.

47139497979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320676874 (or 320676867 counting only the distinct ones).

The product of its digits is 108020304, while the sum is 69.

The spelling of 47139497979 in words is "forty-seven billion, one hundred thirty-nine million, four hundred ninety-seven thousand, nine hundred seventy-nine".