47209191939 has 72 divisors (see below), whose sum is σ = 84534358272. Its totient is φ = 24858550080.

The previous prime is 47209191923. The next prime is 47209191943. The reversal of 47209191939 is 93919190274.

It is a happy number.

It is not a de Polignac number, because 47209191939 - 2⁴ = 47209191923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47209191739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6714744 + ... + 6721770.

Almost surely, 2^47209191939 is an apocalyptic number.

47209191939 is a deficient number, since it is larger than the sum of its proper divisors (37325166333).

47209191939 is a wasteful number, since it uses less digits than its factorization.

47209191939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7697 (or 7681 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 47209191939 in words is "forty-seven billion, two hundred nine million, one hundred ninety-one thousand, nine hundred thirty-nine".