75420239 has 2 divisors, whose sum is σ = 75420240. Its totient is φ = 75420238.

The previous prime is 75420221. The next prime is 75420277. The reversal of 75420239 is 93202457.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75420239 - 2⁸ = 75419983 is a prime.

It is a super-3 number, since 3×75420239³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75420439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37710119 + 37710120.

It is an arithmetic number, because the mean of its divisors is an integer number (37710120).

Almost surely, 2^75420239 is an apocalyptic number.

75420239 is a deficient number, since it is larger than the sum of its proper divisors (1).

75420239 is an equidigital number, since it uses as much as digits as its factorization.

75420239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 75420239 is about 8684.4826558638. The cubic root of 75420239 is about 422.5025178707.

The spelling of 75420239 in words is "seventy-five million, four hundred twenty thousand, two hundred thirty-nine".