71528893 has 2 divisors, whose sum is σ = 71528894. Its totient is φ = 71528892.

The previous prime is 71528861. The next prime is 71528917. The reversal of 71528893 is 39882517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62299449 + 9229444 = 7893^2 + 3038^2 .

It is an emirp because it is prime and its reverse (39882517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71528893 - 2⁵ = 71528861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71528833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35764446 + 35764447.

It is an arithmetic number, because the mean of its divisors is an integer number (35764447).

Almost surely, 2^71528893 is an apocalyptic number.

It is an amenable number.

71528893 is a deficient number, since it is larger than the sum of its proper divisors (1).

71528893 is an equidigital number, since it uses as much as digits as its factorization.

71528893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 71528893 is about 8457.4755689863. The cubic root of 71528893 is about 415.1074246507.

It can be divided in two parts, 7 and 1528893, that multiplied together give a triangular number (10702251 = T₄₆₂₆).

The spelling of 71528893 in words is "seventy-one million, five hundred twenty-eight thousand, eight hundred ninety-three".