75906149 has 4 divisors (see below), whose sum is σ = 82806720. Its totient is φ = 69005580.

The previous prime is 75906133. The next prime is 75906169. The reversal of 75906149 is 94160957.

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: 94160957 = 11 ⋅8560087.

It is a cyclic number.

It is not a de Polignac number, because 75906149 - 2⁴ = 75906133 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 (75906119) 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, 3450269 + ... + 3450290.

It is an arithmetic number, because the mean of its divisors is an integer number (20701680).

Almost surely, 2^75906149 is an apocalyptic number.

It is an amenable number.

75906149 is a deficient number, since it is larger than the sum of its proper divisors (6900571).

75906149 is a wasteful number, since it uses less digits than its factorization.

75906149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900570.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 75906149 is about 8712.4135002880. The cubic root of 75906149 is about 423.4079285885.

The spelling of 75906149 in words is "seventy-five million, nine hundred six thousand, one hundred forty-nine".