51738979 has 2 divisors, whose sum is σ = 51738980. Its totient is φ = 51738978.

The previous prime is 51738977. The next prime is 51738991. The reversal of 51738979 is 97983715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51738979 - 2¹ = 51738977 is a prime.

Together with 51738977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51738977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25869489 + 25869490.

It is an arithmetic number, because the mean of its divisors is an integer number (25869490).

Almost surely, 2^51738979 is an apocalyptic number.

51738979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51738979 is an equidigital number, since it uses as much as digits as its factorization.

51738979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 51738979 is about 7192.9812317286. The cubic root of 51738979 is about 372.6255397168.

The spelling of 51738979 in words is "fifty-one million, seven hundred thirty-eight thousand, nine hundred seventy-nine".