75133749 has 4 divisors (see below), whose sum is σ = 100178336. Its totient is φ = 50089164.

The previous prime is 75133741. The next prime is 75133753. The reversal of 75133749 is 94733157.

It is a happy number.

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.

It is not a de Polignac number, because 75133749 - 2³ = 75133741 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 (75133741) 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, 12522289 + ... + 12522294.

It is an arithmetic number, because the mean of its divisors is an integer number (25044584).

Almost surely, 2^75133749 is an apocalyptic number.

It is an amenable number.

75133749 is a deficient number, since it is larger than the sum of its proper divisors (25044587).

75133749 is a wasteful number, since it uses less digits than its factorization.

75133749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25044586.

The product of its digits is 79380, while the sum is 39.

The square root of 75133749 is about 8667.9726003259. The cubic root of 75133749 is about 421.9668688379.

The spelling of 75133749 in words is "seventy-five million, one hundred thirty-three thousand, seven hundred forty-nine".