1993915 has 16 divisors (see below), whose sum is σ = 2983680. Its totient is φ = 1242720.

The previous prime is 1993877. The next prime is 1993921. The reversal of 1993915 is 5193991.

It is not a de Polignac number, because 1993915 - 2¹⁵ = 1961147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2205 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (186480).

2^1993915 is an apocalyptic number.

1993915 is a deficient number, since it is larger than the sum of its proper divisors (989765).

1993915 is a wasteful number, since it uses less digits than its factorization.

1993915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202.

The product of its digits is 10935, while the sum is 37.

The square root of 1993915 is about 1412.0605511096. The cubic root of 1993915 is about 125.8641981897.

It can be divided in two parts, 199391 and 5, that added together give a triangular number (199396 = T₆₃₁).

The spelling of 1993915 in words is "one million, nine hundred ninety-three thousand, nine hundred fifteen".