81374001 has 8 divisors (see below), whose sum is σ = 109164960. Its totient is φ = 53916192.

The previous prime is 81373997. The next prime is 81374009. The reversal of 81374001 is 10047318.

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

It is not a de Polignac number, because 81374001 - 2² = 81373997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81374009) 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, 82716 + ... + 83693.

It is an arithmetic number, because the mean of its divisors is an integer number (13645620).

Almost surely, 2^81374001 is an apocalyptic number.

It is an amenable number.

81374001 is a deficient number, since it is larger than the sum of its proper divisors (27790959).

81374001 is a wasteful number, since it uses less digits than its factorization.

81374001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166575.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81374001 is about 9020.7539041923. The cubic root of 81374001 is about 433.3397781421.

The spelling of 81374001 in words is "eighty-one million, three hundred seventy-four thousand, one".