71883121 has 2 divisors, whose sum is σ = 71883122. Its totient is φ = 71883120.

The previous prime is 71883109. The next prime is 71883131. The reversal of 71883121 is 12138817.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 5948721 = 8120^2 + 2439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71883121 is a prime.

It is not a weakly prime, because it can be changed into another prime (71883101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35941560 + 35941561.

It is an arithmetic number, because the mean of its divisors is an integer number (35941561).

Almost surely, 2^71883121 is an apocalyptic number.

It is an amenable number.

71883121 is a deficient number, since it is larger than the sum of its proper divisors (1).

71883121 is an equidigital number, since it uses as much as digits as its factorization.

71883121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 31.

The square root of 71883121 is about 8478.3914158288. The cubic root of 71883121 is about 415.7915333245.

The spelling of 71883121 in words is "seventy-one million, eight hundred eighty-three thousand, one hundred twenty-one".