71252939 has 2 divisors, whose sum is σ = 71252940. Its totient is φ = 71252938.

The previous prime is 71252903. The next prime is 71252953. The reversal of 71252939 is 93925217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71252939 - 2²⁰ = 70204363 is a prime.

It is a super-2 number, since 2×71252939² = 10153962632275442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71252039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35626469 + 35626470.

It is an arithmetic number, because the mean of its divisors is an integer number (35626470).

Almost surely, 2^71252939 is an apocalyptic number.

71252939 is a deficient number, since it is larger than the sum of its proper divisors (1).

71252939 is an equidigital number, since it uses as much as digits as its factorization.

71252939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 71252939 is about 8441.1455976070. The cubic root of 71252939 is about 414.5729171921.

The spelling of 71252939 in words is "seventy-one million, two hundred fifty-two thousand, nine hundred thirty-nine".