71199969 has 4 divisors (see below), whose sum is σ = 94933296. Its totient is φ = 47466644.

The previous prime is 71199967. The next prime is 71199977. The reversal of 71199969 is 96999117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71199969 - 2¹ = 71199967 is a prime.

It is a super-2 number, since 2×71199969² = 10138871171201922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71199967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11866659 + ... + 11866664.

It is an arithmetic number, because the mean of its divisors is an integer number (23733324).

Almost surely, 2^71199969 is an apocalyptic number.

It is an amenable number.

71199969 is a deficient number, since it is larger than the sum of its proper divisors (23733327).

71199969 is a wasteful number, since it uses less digits than its factorization.

71199969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23733326.

The product of its digits is 275562, while the sum is 51.

The square root of 71199969 is about 8438.0074069652. The cubic root of 71199969 is about 414.4701594593.

The spelling of 71199969 in words is "seventy-one million, one hundred ninety-nine thousand, nine hundred sixty-nine".