51276739 has 4 divisors (see below), whose sum is σ = 51402520. Its totient is φ = 51150960.

The previous prime is 51276713. The next prime is 51276749. The reversal of 51276739 is 93767215.

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

It is a cyclic number.

It is not a de Polignac number, because 51276739 - 2¹⁷ = 51145667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51276749) 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, 62277 + ... + 63094.

It is an arithmetic number, because the mean of its divisors is an integer number (12850630).

Almost surely, 2^51276739 is an apocalyptic number.

51276739 is a deficient number, since it is larger than the sum of its proper divisors (125781).

51276739 is a wasteful number, since it uses less digits than its factorization.

51276739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125780.

The product of its digits is 79380, while the sum is 40.

The square root of 51276739 is about 7160.7778208795. Note that the first 3 decimals coincide. The cubic root of 51276739 is about 371.5125301680.

The spelling of 51276739 in words is "fifty-one million, two hundred seventy-six thousand, seven hundred thirty-nine".