73142539 has 2 divisors, whose sum is σ = 73142540. Its totient is φ = 73142538.

The previous prime is 73142521. The next prime is 73142543. The reversal of 73142539 is 93524137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73142539 - 2⁷ = 73142411 is a prime.

It is a super-2 number, since 2×73142539² = 10699662022733042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73142579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36571269 + 36571270.

It is an arithmetic number, because the mean of its divisors is an integer number (36571270).

Almost surely, 2^73142539 is an apocalyptic number.

73142539 is a deficient number, since it is larger than the sum of its proper divisors (1).

73142539 is an equidigital number, since it uses as much as digits as its factorization.

73142539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 73142539 is about 8552.3411414653. The cubic root of 73142539 is about 418.2057605141.

The spelling of 73142539 in words is "seventy-three million, one hundred forty-two thousand, five hundred thirty-nine".