91679447 has 4 divisors (see below), whose sum is σ = 92209560. Its totient is φ = 91149336.

The previous prime is 91679429. The next prime is 91679461. The reversal of 91679447 is 74497619.

It is a happy number.

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 91679447 - 2⁸ = 91679191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91679477) 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, 264797 + ... + 265142.

It is an arithmetic number, because the mean of its divisors is an integer number (23052390).

Almost surely, 2^91679447 is an apocalyptic number.

91679447 is a deficient number, since it is larger than the sum of its proper divisors (530113).

91679447 is a wasteful number, since it uses less digits than its factorization.

91679447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530112.

The product of its digits is 381024, while the sum is 47.

The square root of 91679447 is about 9574.9384854421. The cubic root of 91679447 is about 450.9108251540.

The spelling of 91679447 in words is "ninety-one million, six hundred seventy-nine thousand, four hundred forty-seven".