75149791 has 2 divisors, whose sum is σ = 75149792. Its totient is φ = 75149790.

The previous prime is 75149783. The next prime is 75149819. The reversal of 75149791 is 19794157.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75149791 - 2³ = 75149783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75149771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37574895 + 37574896.

It is an arithmetic number, because the mean of its divisors is an integer number (37574896).

Almost surely, 2^75149791 is an apocalyptic number.

75149791 is a deficient number, since it is larger than the sum of its proper divisors (1).

75149791 is an equidigital number, since it uses as much as digits as its factorization.

75149791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 75149791 is about 8668.8979114995. The cubic root of 75149791 is about 421.9968984446.

The spelling of 75149791 in words is "seventy-five million, one hundred forty-nine thousand, seven hundred ninety-one".