1931113 has 2 divisors, whose sum is σ = 1931114. Its totient is φ = 1931112.

The previous prime is 1931101. The next prime is 1931123. The reversal of 1931113 is 3111391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1567504 + 363609 = 1252^2 + 603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1931113 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1931123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965556 + 965557.

It is an arithmetic number, because the mean of its divisors is an integer number (965557).

2^1931113 is an apocalyptic number.

It is an amenable number.

1931113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931113 is an equidigital number, since it uses as much as digits as its factorization.

1931113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81, while the sum is 19.

The square root of 1931113 is about 1389.6449186753. The cubic root of 1931113 is about 124.5286354244.

The spelling of 1931113 in words is "one million, nine hundred thirty-one thousand, one hundred thirteen".