71900417 has 2 divisors, whose sum is σ = 71900418. Its totient is φ = 71900416.

The previous prime is 71900393. The next prime is 71900419. The reversal of 71900417 is 71400917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71639296 + 261121 = 8464^2 + 511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71900417 is a prime.

Together with 71900419, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71900417.

It is not a weakly prime, because it can be changed into another prime (71900419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35950208 + 35950209.

It is an arithmetic number, because the mean of its divisors is an integer number (35950209).

Almost surely, 2^71900417 is an apocalyptic number.

It is an amenable number.

71900417 is a deficient number, since it is larger than the sum of its proper divisors (1).

71900417 is an equidigital number, since it uses as much as digits as its factorization.

71900417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71900417 is about 8479.4113592867. The cubic root of 71900417 is about 415.8248789071.

Subtracting from 71900417 its reverse (71400917), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 71900417 in words is "seventy-one million, nine hundred thousand, four hundred seventeen".