1913291 has 2 divisors, whose sum is σ = 1913292. Its totient is φ = 1913290.

The previous prime is 1913287. The next prime is 1913293. The reversal of 1913291 is 1923191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1913291 - 2² = 1913287 is a prime.

It is a Sophie Germain prime.

Together with 1913293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1913291.

It is not a weakly prime, because it can be changed into another prime (1913293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956645 + 956646.

It is an arithmetic number, because the mean of its divisors is an integer number (956646).

2^1913291 is an apocalyptic number.

1913291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913291 is an equidigital number, since it uses as much as digits as its factorization.

1913291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The square root of 1913291 is about 1383.2176256830. The cubic root of 1913291 is about 124.1443644663.

The spelling of 1913291 in words is "one million, nine hundred thirteen thousand, two hundred ninety-one".