974748139 has 4 divisors (see below), whose sum is σ = 974894560. Its totient is φ = 974601720.

The previous prime is 974748121. The next prime is 974748157. The reversal of 974748139 is 931847479.

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

It is an interprime number because it is at equal distance from previous prime (974748121) and next prime (974748157).

It is a cyclic number.

It is not a de Polignac number, because 974748139 - 2⁷ = 974748011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (974748179) 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, 62724 + ... + 76705.

It is an arithmetic number, because the mean of its divisors is an integer number (243723640).

Almost surely, 2^974748139 is an apocalyptic number.

974748139 is a deficient number, since it is larger than the sum of its proper divisors (146421).

974748139 is a wasteful number, since it uses less digits than its factorization.

974748139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146420.

The product of its digits is 1524096, while the sum is 52.

The square root of 974748139 is about 31220.9567278135. The cubic root of 974748139 is about 991.5108512793.

The spelling of 974748139 in words is "nine hundred seventy-four million, seven hundred forty-eight thousand, one hundred thirty-nine".