71290969 has 2 divisors, whose sum is σ = 71290970. Its totient is φ = 71290968.

The previous prime is 71290949. The next prime is 71290981. The reversal of 71290969 is 96909217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 29300569 = 6480^2 + 5413^2 .

It is an emirp because it is prime and its reverse (96909217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71290969 - 2⁵ = 71290937 is a prime.

It is a super-2 number, since 2×71290969² = 10164804521917922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71290949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35645484 + 35645485.

It is an arithmetic number, because the mean of its divisors is an integer number (35645485).

Almost surely, 2^71290969 is an apocalyptic number.

It is an amenable number.

71290969 is a deficient number, since it is larger than the sum of its proper divisors (1).

71290969 is an equidigital number, since it uses as much as digits as its factorization.

71290969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 71290969 is about 8443.3979534308. The cubic root of 71290969 is about 414.6466610691.

The spelling of 71290969 in words is "seventy-one million, two hundred ninety thousand, nine hundred sixty-nine".