81374108 has 24 divisors (see below), whose sum is σ = 147302400. Its totient is φ = 39310128.

The previous prime is 81374089. The next prime is 81374129. The reversal of 81374108 is 80147318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12113 + ... + 17591.

It is an arithmetic number, because the mean of its divisors is an integer number (6137600).

Almost surely, 2^81374108 is an apocalyptic number.

It is an amenable number.

81374108 is a deficient number, since it is larger than the sum of its proper divisors (65928292).

81374108 is a wasteful number, since it uses less digits than its factorization.

81374108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609 (or 5607 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 81374108 is about 9020.7598349585. The cubic root of 81374108 is about 433.3399680772.

The spelling of 81374108 in words is "eighty-one million, three hundred seventy-four thousand, one hundred eight".