71420233 has 2 divisors, whose sum is σ = 71420234. Its totient is φ = 71420232.

The previous prime is 71420197. The next prime is 71420263. The reversal of 71420233 is 33202417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71368704 + 51529 = 8448^2 + 227^2 .

It is an emirp because it is prime and its reverse (33202417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71420233 is a prime.

It is not a weakly prime, because it can be changed into another prime (71420263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35710116 + 35710117.

It is an arithmetic number, because the mean of its divisors is an integer number (35710117).

Almost surely, 2^71420233 is an apocalyptic number.

It is an amenable number.

71420233 is a deficient number, since it is larger than the sum of its proper divisors (1).

71420233 is an equidigital number, since it uses as much as digits as its factorization.

71420233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 71420233 is about 8451.0492248004. The cubic root of 71420233 is about 414.8971206732.

The spelling of 71420233 in words is "seventy-one million, four hundred twenty thousand, two hundred thirty-three".