75252709 has 32 divisors (see below), whose sum is σ = 93899520. Its totient is φ = 58931712.

The previous prime is 75252691. The next prime is 75252713. The reversal of 75252709 is 90725257.

It is not a de Polignac number, because 75252709 - 2⁵ = 75252677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75252799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322857 + ... + 323089.

It is an arithmetic number, because the mean of its divisors is an integer number (2934360).

Almost surely, 2^75252709 is an apocalyptic number.

It is an amenable number.

75252709 is a deficient number, since it is larger than the sum of its proper divisors (18646811).

75252709 is a wasteful number, since it uses less digits than its factorization.

75252709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 75252709 is about 8674.8319292076. The cubic root of 75252709 is about 422.1894528302.

It can be divided in two parts, 7525 and 2709, that multiplied together give a square (20385225 = 4515²).

The spelling of 75252709 in words is "seventy-five million, two hundred fifty-two thousand, seven hundred nine".