3972517139 has 4 divisors (see below), whose sum is σ = 4026935256. Its totient is φ = 3918099024.

The previous prime is 3972517123. The next prime is 3972517163. The reversal of 3972517139 is 9317152793.

3972517139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3972517139 - 2⁴ = 3972517123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3972517093 and 3972517102.

It is not an unprimeable number, because it can be changed into a prime (3972517189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27208949 + ... + 27209094.

It is an arithmetic number, because the mean of its divisors is an integer number (1006733814).

Almost surely, 2^3972517139 is an apocalyptic number.

3972517139 is a deficient number, since it is larger than the sum of its proper divisors (54418117).

3972517139 is an equidigital number, since it uses as much as digits as its factorization.

3972517139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54418116.

The product of its digits is 357210, while the sum is 47.

The square root of 3972517139 is about 63027.9076203550. The cubic root of 3972517139 is about 1583.7571669450.

The spelling of 3972517139 in words is "three billion, nine hundred seventy-two million, five hundred seventeen thousand, one hundred thirty-nine".