1697949131 has 2 divisors, whose sum is σ = 1697949132. Its totient is φ = 1697949130.

The previous prime is 1697949073. The next prime is 1697949139. The reversal of 1697949131 is 1319497961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1697949131 - 2¹⁰ = 1697948107 is a prime.

It is a super-2 number, since 2×1697949131² = 5766062502927310322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1697949131.

It is not a weakly prime, because it can be changed into another prime (1697949139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848974565 + 848974566.

It is an arithmetic number, because the mean of its divisors is an integer number (848974566).

Almost surely, 2^1697949131 is an apocalyptic number.

1697949131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697949131 is an equidigital number, since it uses as much as digits as its factorization.

1697949131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 1697949131 is about 41206.1783110252. The cubic root of 1697949131 is about 1193.0030620003.

The spelling of 1697949131 in words is "one billion, six hundred ninety-seven million, nine hundred forty-nine thousand, one hundred thirty-one".