1913087 has 4 divisors (see below), whose sum is σ = 2087016. Its totient is φ = 1739160.

The previous prime is 1913081. The next prime is 1913089. The reversal of 1913087 is 7803191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7803191 = 11 ⋅709381.

It is a cyclic number.

It is not a de Polignac number, because 1913087 - 2⁸ = 1912831 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 (1913081) 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, 86948 + ... + 86969.

It is an arithmetic number, because the mean of its divisors is an integer number (521754).

2^1913087 is an apocalyptic number.

1913087 is a deficient number, since it is larger than the sum of its proper divisors (173929).

1913087 is a wasteful number, since it uses less digits than its factorization.

1913087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173928.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1913087 is about 1383.1438826095. The cubic root of 1913087 is about 124.1399521125.

The spelling of 1913087 in words is "one million, nine hundred thirteen thousand, eighty-seven".