1913139 has 12 divisors (see below), whose sum is σ = 2866136. Its totient is φ = 1275264.

The previous prime is 1913123. The next prime is 1913147. The reversal of 1913139 is 9313191.

It is not a de Polignac number, because 1913139 - 2⁴ = 1913123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3694 + ... + 4179.

2^1913139 is an apocalyptic number.

1913139 is a deficient number, since it is larger than the sum of its proper divisors (952997).

1913139 is an frugal number, since it uses more digits than its factorization.

1913139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7888 (or 7876 counting only the distinct ones).

The product of its digits is 729, while the sum is 27.

The square root of 1913139 is about 1383.1626802369. The cubic root of 1913139 is about 124.1410768599.

The spelling of 1913139 in words is "one million, nine hundred thirteen thousand, one hundred thirty-nine".