75148979 has 2 divisors, whose sum is σ = 75148980. Its totient is φ = 75148978.

The previous prime is 75148973. The next prime is 75149003. The reversal of 75148979 is 97984157.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75148979 - 2²⁴ = 58371763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75148973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37574489 + 37574490.

It is an arithmetic number, because the mean of its divisors is an integer number (37574490).

Almost surely, 2^75148979 is an apocalyptic number.

75148979 is a deficient number, since it is larger than the sum of its proper divisors (1).

75148979 is an equidigital number, since it uses as much as digits as its factorization.

75148979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 75148979 is about 8668.8510772766. The cubic root of 75148979 is about 421.9953785348.

The spelling of 75148979 in words is "seventy-five million, one hundred forty-eight thousand, nine hundred seventy-nine".