75042949 has 2 divisors, whose sum is σ = 75042950. Its totient is φ = 75042948.

The previous prime is 75042943. The next prime is 75042977. The reversal of 75042949 is 94924057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73102500 + 1940449 = 8550^2 + 1393^2 .

It is a cyclic number.

It is not a de Polignac number, because 75042949 - 2⁵ = 75042917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75042943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37521474 + 37521475.

It is an arithmetic number, because the mean of its divisors is an integer number (37521475).

Almost surely, 2^75042949 is an apocalyptic number.

It is an amenable number.

75042949 is a deficient number, since it is larger than the sum of its proper divisors (1).

75042949 is an equidigital number, since it uses as much as digits as its factorization.

75042949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 75042949 is about 8662.7333446205. The cubic root of 75042949 is about 421.7968163776.

The spelling of 75042949 in words is "seventy-five million, forty-two thousand, nine hundred forty-nine".