75372739 has 4 divisors (see below), whose sum is σ = 81170656. Its totient is φ = 69574824.

The previous prime is 75372733. The next prime is 75372761. The reversal of 75372739 is 93727357.

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 75372739 - 2²⁵ = 41818307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75372695 and 75372704.

It is not an unprimeable number, because it can be changed into a prime (75372733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898939 + ... + 2898964.

It is an arithmetic number, because the mean of its divisors is an integer number (20292664).

Almost surely, 2^75372739 is an apocalyptic number.

75372739 is a deficient number, since it is larger than the sum of its proper divisors (5797917).

75372739 is a wasteful number, since it uses less digits than its factorization.

75372739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797916.

The product of its digits is 277830, while the sum is 43.

The square root of 75372739 is about 8681.7474623488. The cubic root of 75372739 is about 422.4138012587.

The spelling of 75372739 in words is "seventy-five million, three hundred seventy-two thousand, seven hundred thirty-nine".