75213917 has 2 divisors, whose sum is σ = 75213918. Its totient is φ = 75213916.

The previous prime is 75213889. The next prime is 75213937. The reversal of 75213917 is 71931257.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70744921 + 4468996 = 8411^2 + 2114^2 .

It is an emirp because it is prime and its reverse (71931257) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75213917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75213937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37606958 + 37606959.

It is an arithmetic number, because the mean of its divisors is an integer number (37606959).

Almost surely, 2^75213917 is an apocalyptic number.

It is an amenable number.

75213917 is a deficient number, since it is larger than the sum of its proper divisors (1).

75213917 is an equidigital number, since it uses as much as digits as its factorization.

75213917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 35.

The square root of 75213917 is about 8672.5957475257. The cubic root of 75213917 is about 422.1168955831.

The spelling of 75213917 in words is "seventy-five million, two hundred thirteen thousand, nine hundred seventeen".