71623869 has 4 divisors (see below), whose sum is σ = 95498496. Its totient is φ = 47749244.

The previous prime is 71623841. The next prime is 71623913. The reversal of 71623869 is 96832617.

It is a happy number.

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 71623869 - 2⁵ = 71623837 is a prime.

It is a super-2 number, since 2×71623869² = 10259957221058322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71623869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71623819) 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 in 3 ways as a sum of consecutive naturals, for example, 11937309 + ... + 11937314.

It is an arithmetic number, because the mean of its divisors is an integer number (23874624).

Almost surely, 2^71623869 is an apocalyptic number.

It is an amenable number.

71623869 is a deficient number, since it is larger than the sum of its proper divisors (23874627).

71623869 is a wasteful number, since it uses less digits than its factorization.

71623869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23874626.

The product of its digits is 108864, while the sum is 42.

The square root of 71623869 is about 8463.0886205924. The cubic root of 71623869 is about 415.2910698155.

The spelling of 71623869 in words is "seventy-one million, six hundred twenty-three thousand, eight hundred sixty-nine".