17420087 has 4 divisors (see below), whose sum is σ = 18444816. Its totient is φ = 16395360.

The previous prime is 17420083. The next prime is 17420099. The reversal of 17420087 is 78002471.

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 17420087 - 2² = 17420083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17420083) 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, 512339 + ... + 512372.

It is an arithmetic number, because the mean of its divisors is an integer number (4611204).

Almost surely, 2^17420087 is an apocalyptic number.

17420087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

17420087 is a deficient number, since it is larger than the sum of its proper divisors (1024729).

17420087 is a wasteful number, since it uses less digits than its factorization.

17420087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024728.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 17420087 is about 4173.7377732675. The cubic root of 17420087 is about 259.2289136619.

The spelling of 17420087 in words is "seventeen million, four hundred twenty thousand, eighty-seven".