974387139 has 32 divisors (see below), whose sum is σ = 1454112000. Its totient is φ = 575352960.

The previous prime is 974387123. The next prime is 974387143. The reversal of 974387139 is 931783479.

It is not a de Polignac number, because 974387139 - 2⁴ = 974387123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 974387091 and 974387100.

It is not an unprimeable number, because it can be changed into a prime (974387159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258732 + ... + 262470.

It is an arithmetic number, because the mean of its divisors is an integer number (45441000).

Almost surely, 2^974387139 is an apocalyptic number.

974387139 is a deficient number, since it is larger than the sum of its proper divisors (479724861).

974387139 is a wasteful number, since it uses less digits than its factorization.

974387139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955.

The product of its digits is 1143072, while the sum is 51.

The square root of 974387139 is about 31215.1748193086. The cubic root of 974387139 is about 991.3884334637.

The spelling of 974387139 in words is "nine hundred seventy-four million, three hundred eighty-seven thousand, one hundred thirty-nine".