81674907 has 8 divisors (see below), whose sum is σ = 108989520. Its totient is φ = 54405120.

The previous prime is 81674891. The next prime is 81674917. The reversal of 81674907 is 70947618.

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

It is not a de Polignac number, because 81674907 - 2⁴ = 81674891 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (81674917) 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, 6694 + ... + 14427.

It is an arithmetic number, because the mean of its divisors is an integer number (13623690).

Almost surely, 2^81674907 is an apocalyptic number.

81674907 is a deficient number, since it is larger than the sum of its proper divisors (27314613).

81674907 is a wasteful number, since it uses less digits than its factorization.

81674907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22413.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 81674907 is about 9037.4170535613. The cubic root of 81674907 is about 433.8732578863.

The spelling of 81674907 in words is "eighty-one million, six hundred seventy-four thousand, nine hundred seven".