71408569 has 2 divisors, whose sum is σ = 71408570. Its totient is φ = 71408568.

The previous prime is 71408539. The next prime is 71408573. The reversal of 71408569 is 96580417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 2518569 = 8300^2 + 1587^2 .

It is a cyclic number.

It is not a de Polignac number, because 71408569 - 2¹¹ = 71406521 is a prime.

It is a super-2 number, since 2×71408569² = 10198367453255522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71408539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35704284 + 35704285.

It is an arithmetic number, because the mean of its divisors is an integer number (35704285).

Almost surely, 2^71408569 is an apocalyptic number.

It is an amenable number.

71408569 is a deficient number, since it is larger than the sum of its proper divisors (1).

71408569 is an equidigital number, since it uses as much as digits as its factorization.

71408569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 71408569 is about 8450.3591047955. The cubic root of 71408569 is about 414.8745331268.

The spelling of 71408569 in words is "seventy-one million, four hundred eight thousand, five hundred sixty-nine".