51017979 has 8 divisors (see below), whose sum is σ = 70981632. Its totient is φ = 32533160.

The previous prime is 51017977. The next prime is 51017987. The reversal of 51017979 is 97971015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51017979 - 2¹ = 51017977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51017977) 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, 369627 + ... + 369764.

It is an arithmetic number, because the mean of its divisors is an integer number (8872704).

Almost surely, 2^51017979 is an apocalyptic number.

51017979 is a deficient number, since it is larger than the sum of its proper divisors (19963653).

51017979 is a wasteful number, since it uses less digits than its factorization.

51017979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739417.

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 51017979 is about 7142.6870994045. The cubic root of 51017979 is about 370.8865494923.

The spelling of 51017979 in words is "fifty-one million, seventeen thousand, nine hundred seventy-nine".