56170091 has 4 divisors (see below), whose sum is σ = 59474232. Its totient is φ = 52865952.

The previous prime is 56170087. The next prime is 56170097. The reversal of 56170091 is 19007165.

It is a happy number.

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 56170091 - 2² = 56170087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56170097) 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, 1652045 + ... + 1652078.

It is an arithmetic number, because the mean of its divisors is an integer number (14868558).

Almost surely, 2^56170091 is an apocalyptic number.

56170091 is a deficient number, since it is larger than the sum of its proper divisors (3304141).

56170091 is a wasteful number, since it uses less digits than its factorization.

56170091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304140.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 56170091 is about 7494.6708400036. The cubic root of 56170091 is about 382.9731931145.

The spelling of 56170091 in words is "fifty-six million, one hundred seventy thousand, ninety-one".