75479249 has 2 divisors, whose sum is σ = 75479250. Its totient is φ = 75479248.

The previous prime is 75479179. The next prime is 75479251. The reversal of 75479249 is 94297457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72982849 + 2496400 = 8543^2 + 1580^2 .

It is an emirp because it is prime and its reverse (94297457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75479249 - 2⁸ = 75478993 is a prime.

Together with 75479251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75479279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37739624 + 37739625.

It is an arithmetic number, because the mean of its divisors is an integer number (37739625).

Almost surely, 2^75479249 is an apocalyptic number.

It is an amenable number.

75479249 is a deficient number, since it is larger than the sum of its proper divisors (1).

75479249 is an equidigital number, since it uses as much as digits as its factorization.

75479249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 75479249 is about 8687.8794305630. The cubic root of 75479249 is about 422.6126800516.

The spelling of 75479249 in words is "seventy-five million, four hundred seventy-nine thousand, two hundred forty-nine".