2978638137 has 8 divisors (see below), whose sum is σ = 4412797280. Its totient is φ = 1985758740.

The previous prime is 2978638133. The next prime is 2978638141. The reversal of 2978638137 is 7318368792.

It is an interprime number because it is at equal distance from previous prime (2978638133) and next prime (2978638141).

It is not a de Polignac number, because 2978638137 - 2² = 2978638133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978638133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55159939 + ... + 55159992.

It is an arithmetic number, because the mean of its divisors is an integer number (551599660).

Almost surely, 2^2978638137 is an apocalyptic number.

2978638137 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2978638137 is a deficient number, since it is larger than the sum of its proper divisors (1434159143).

2978638137 is a wasteful number, since it uses less digits than its factorization.

2978638137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110319940 (or 110319934 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 2978638137 is about 54576.9011304233. The cubic root of 2978638137 is about 1438.8181752934.

The spelling of 2978638137 in words is "two billion, nine hundred seventy-eight million, six hundred thirty-eight thousand, one hundred thirty-seven".