1002977139 has 4 divisors (see below), whose sum is σ = 1337302856. Its totient is φ = 668651424.

The previous prime is 1002977081. The next prime is 1002977147. The reversal of 1002977139 is 9317792001.

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

It is not a de Polignac number, because 1002977139 - 2⁷ = 1002977011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002977097 and 1002977106.

It is not an unprimeable number, because it can be changed into a prime (1002977179) 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, 167162854 + ... + 167162859.

It is an arithmetic number, because the mean of its divisors is an integer number (334325714).

Almost surely, 2^1002977139 is an apocalyptic number.

1002977139 is a deficient number, since it is larger than the sum of its proper divisors (334325717).

1002977139 is an equidigital number, since it uses as much as digits as its factorization.

1002977139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334325716.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 1002977139 is about 31669.8143190010. The cubic root of 1002977139 is about 1000.9913964749.

The spelling of 1002977139 in words is "one billion, two million, nine hundred seventy-seven thousand, one hundred thirty-nine".