71679551 has 4 divisors (see below), whose sum is σ = 71713752. Its totient is φ = 71645352.

The previous prime is 71679539. The next prime is 71679557. The reversal of 71679551 is 15597617.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71679551 - 2¹⁰ = 71678527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71679499 and 71679508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71679557) 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, 13736 + ... + 18221.

It is an arithmetic number, because the mean of its divisors is an integer number (17928438).

Almost surely, 2^71679551 is an apocalyptic number.

71679551 is a deficient number, since it is larger than the sum of its proper divisors (34201).

71679551 is a wasteful number, since it uses less digits than its factorization.

71679551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34200.

The product of its digits is 66150, while the sum is 41.

The square root of 71679551 is about 8466.3776787951. The cubic root of 71679551 is about 415.3986607989.

The spelling of 71679551 in words is "seventy-one million, six hundred seventy-nine thousand, five hundred fifty-one".