75339917 has 2 divisors, whose sum is σ = 75339918. Its totient is φ = 75339916.

The previous prime is 75339911. The next prime is 75339947. The reversal of 75339917 is 71993357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75151561 + 188356 = 8669^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 75339917 - 2⁶ = 75339853 is a prime.

It is a super-2 number, since 2×75339917² = 11352206187133778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75339911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37669958 + 37669959.

It is an arithmetic number, because the mean of its divisors is an integer number (37669959).

Almost surely, 2^75339917 is an apocalyptic number.

It is an amenable number.

75339917 is a deficient number, since it is larger than the sum of its proper divisors (1).

75339917 is an equidigital number, since it uses as much as digits as its factorization.

75339917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 178605, while the sum is 44.

The square root of 75339917 is about 8679.8569688676. The cubic root of 75339917 is about 422.3524772357.

The spelling of 75339917 in words is "seventy-five million, three hundred thirty-nine thousand, nine hundred seventeen".