71523919 has 2 divisors, whose sum is σ = 71523920. Its totient is φ = 71523918.

The previous prime is 71523901. The next prime is 71523931. The reversal of 71523919 is 91932517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71523919 - 2⁷ = 71523791 is a prime.

It is a super-2 number, since 2×71523919² = 10231341978237122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71529919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35761959 + 35761960.

It is an arithmetic number, because the mean of its divisors is an integer number (35761960).

Almost surely, 2^71523919 is an apocalyptic number.

71523919 is a deficient number, since it is larger than the sum of its proper divisors (1).

71523919 is an equidigital number, since it uses as much as digits as its factorization.

71523919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 37.

The square root of 71523919 is about 8457.1815044966. The cubic root of 71523919 is about 415.0978024682.

The spelling of 71523919 in words is "seventy-one million, five hundred twenty-three thousand, nine hundred nineteen".