75512749 has 12 divisors (see below), whose sum is σ = 85327776. Its totient is φ = 66670032.

The previous prime is 75512741. The next prime is 75512791. The reversal of 75512749 is 94721557.

It is not a de Polignac number, because 75512749 - 2³ = 75512741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75512741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5827 + ... + 13600.

It is an arithmetic number, because the mean of its divisors is an integer number (7110648).

Almost surely, 2^75512749 is an apocalyptic number.

It is an amenable number.

75512749 is a deficient number, since it is larger than the sum of its proper divisors (9815027).

75512749 is a wasteful number, since it uses less digits than its factorization.

75512749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19476 (or 19463 counting only the distinct ones).

The product of its digits is 88200, while the sum is 40.

The square root of 75512749 is about 8689.8071900359. The cubic root of 75512749 is about 422.6751936165.

The spelling of 75512749 in words is "seventy-five million, five hundred twelve thousand, seven hundred forty-nine".