81492267 has 8 divisors (see below), whose sum is σ = 111183424. Its totient is φ = 53064648.

The previous prime is 81492247. The next prime is 81492269. The reversal of 81492267 is 76229418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81492267 - 2⁸ = 81492011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81492269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315733 + ... + 315990.

It is an arithmetic number, because the mean of its divisors is an integer number (13897928).

Almost surely, 2^81492267 is an apocalyptic number.

81492267 is a deficient number, since it is larger than the sum of its proper divisors (29691157).

81492267 is a wasteful number, since it uses less digits than its factorization.

81492267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631769.

The product of its digits is 48384, while the sum is 39.

The square root of 81492267 is about 9027.3067412158. The cubic root of 81492267 is about 433.5496099214.

The spelling of 81492267 in words is "eighty-one million, four hundred ninety-two thousand, two hundred sixty-seven".