75372729 has 4 divisors (see below), whose sum is σ = 100496976. Its totient is φ = 50248484.

The previous prime is 75372727. The next prime is 75372733. The reversal of 75372729 is 92727357.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92727357 = 3 ⋅30909119.

It is a cyclic number.

It is not a de Polignac number, because 75372729 - 2¹ = 75372727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75372721) 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, 12562119 + ... + 12562124.

It is an arithmetic number, because the mean of its divisors is an integer number (25124244).

Almost surely, 2^75372729 is an apocalyptic number.

It is an amenable number.

75372729 is a deficient number, since it is larger than the sum of its proper divisors (25124247).

75372729 is a wasteful number, since it uses less digits than its factorization.

75372729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25124246.

The product of its digits is 185220, while the sum is 42.

The square root of 75372729 is about 8681.7468864279. The cubic root of 75372729 is about 422.4137825776.

The spelling of 75372729 in words is "seventy-five million, three hundred seventy-two thousand, seven hundred twenty-nine".