71939057 has 2 divisors, whose sum is σ = 71939058. Its totient is φ = 71939056.

The previous prime is 71939047. The next prime is 71939071. The reversal of 71939057 is 75093917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44102881 + 27836176 = 6641^2 + 5276^2 .

It is an emirp because it is prime and its reverse (75093917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71939057 - 2¹⁶ = 71873521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71939017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35969528 + 35969529.

It is an arithmetic number, because the mean of its divisors is an integer number (35969529).

Almost surely, 2^71939057 is an apocalyptic number.

It is an amenable number.

71939057 is a deficient number, since it is larger than the sum of its proper divisors (1).

71939057 is an equidigital number, since it uses as much as digits as its factorization.

71939057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 71939057 is about 8481.6895132986. The cubic root of 71939057 is about 415.8993550441.

The spelling of 71939057 in words is "seventy-one million, nine hundred thirty-nine thousand, fifty-seven".