1697949061 has 2 divisors, whose sum is σ = 1697949062. Its totient is φ = 1697949060.

The previous prime is 1697949053. The next prime is 1697949073. The reversal of 1697949061 is 1609497961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1694886561 + 3062500 = 41169^2 + 1750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1697949061 - 2³ = 1697949053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1697949361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848974530 + 848974531.

It is an arithmetic number, because the mean of its divisors is an integer number (848974531).

Almost surely, 2^1697949061 is an apocalyptic number.

It is an amenable number.

1697949061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697949061 is an equidigital number, since it uses as much as digits as its factorization.

1697949061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 1697949061 is about 41206.1774616380. The cubic root of 1697949061 is about 1193.0030456059.

The spelling of 1697949061 in words is "one billion, six hundred ninety-seven million, nine hundred forty-nine thousand, sixty-one".