1931497 has 2 divisors, whose sum is σ = 1931498. Its totient is φ = 1931496.

The previous prime is 1931477. The next prime is 1931513. The reversal of 1931497 is 7941391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 24336 = 1381^2 + 156^2 .

It is an emirp because it is prime and its reverse (7941391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1931497 is a prime.

It is a super-2 number, since 2×1931497² = 7461361322018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1931477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965748 + 965749.

It is an arithmetic number, because the mean of its divisors is an integer number (965749).

2^1931497 is an apocalyptic number.

It is an amenable number.

1931497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931497 is an equidigital number, since it uses as much as digits as its factorization.

1931497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 1931497 is about 1389.7830765986. The cubic root of 1931497 is about 124.5368890113.

The spelling of 1931497 in words is "one million, nine hundred thirty-one thousand, four hundred ninety-seven".