75215993 has 2 divisors, whose sum is σ = 75215994. Its totient is φ = 75215992.

The previous prime is 75215983. The next prime is 75216047. The reversal of 75215993 is 39951257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73222249 + 1993744 = 8557^2 + 1412^2 .

It is a cyclic number.

It is not a de Polignac number, because 75215993 - 2⁴ = 75215977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75215993.

It is not a weakly prime, because it can be changed into another prime (75215953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37607996 + 37607997.

It is an arithmetic number, because the mean of its divisors is an integer number (37607997).

Almost surely, 2^75215993 is an apocalyptic number.

It is an amenable number.

75215993 is a deficient number, since it is larger than the sum of its proper divisors (1).

75215993 is an equidigital number, since it uses as much as digits as its factorization.

75215993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 41.

The square root of 75215993 is about 8672.7154340495. The cubic root of 75215993 is about 422.1207792022.

The spelling of 75215993 in words is "seventy-five million, two hundred fifteen thousand, nine hundred ninety-three".