71951863 has 2 divisors, whose sum is σ = 71951864. Its totient is φ = 71951862.

The previous prime is 71951849. The next prime is 71951909. The reversal of 71951863 is 36815917.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71951863 is a prime.

It is a super-3 number, since 3×71951863³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71951563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35975931 + 35975932.

It is an arithmetic number, because the mean of its divisors is an integer number (35975932).

Almost surely, 2^71951863 is an apocalyptic number.

71951863 is a deficient number, since it is larger than the sum of its proper divisors (1).

71951863 is an equidigital number, since it uses as much as digits as its factorization.

71951863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 71951863 is about 8482.4444000536. Note that the first 4 decimals coincide. The cubic root of 71951863 is about 415.9240319088.

The spelling of 71951863 in words is "seventy-one million, nine hundred fifty-one thousand, eight hundred sixty-three".