81474007 has 4 divisors (see below), whose sum is σ = 81520336. Its totient is φ = 81427680.

The previous prime is 81473993. The next prime is 81474031. The reversal of 81474007 is 70047418.

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 81474007 - 2²³ = 73085399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81474007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81474067) 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, 20418 + ... + 24079.

It is an arithmetic number, because the mean of its divisors is an integer number (20380084).

Almost surely, 2^81474007 is an apocalyptic number.

81474007 is a deficient number, since it is larger than the sum of its proper divisors (46329).

81474007 is a wasteful number, since it uses less digits than its factorization.

81474007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46328.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 81474007 is about 9026.2953087078. The cubic root of 81474007 is about 433.5172256330.

The spelling of 81474007 in words is "eighty-one million, four hundred seventy-four thousand, seven".