1913864 has 8 divisors (see below), whose sum is σ = 3588510. Its totient is φ = 956928.

The previous prime is 1913861. The next prime is 1913867. The reversal of 1913864 is 4683191.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1913861) and next prime (1913867).

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 828100 = 1042^2 + 910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1913864.

It is not an unprimeable number, because it can be changed into a prime (1913861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119609 + ... + 119624.

2^1913864 is an apocalyptic number.

It is an amenable number.

1913864 is a deficient number, since it is larger than the sum of its proper divisors (1674646).

1913864 is a wasteful number, since it uses less digits than its factorization.

1913864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239239 (or 239235 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 1913864 is about 1383.4247359361. The cubic root of 1913864 is about 124.1567563121.

The spelling of 1913864 in words is "one million, nine hundred thirteen thousand, eight hundred sixty-four".