39497261 has 2 divisors, whose sum is σ = 39497262. Its totient is φ = 39497260.

The previous prime is 39497251. The next prime is 39497281. The reversal of 39497261 is 16279493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35772361 + 3724900 = 5981^2 + 1930^2 .

It is an emirp because it is prime and its reverse (16279493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39497261 - 2⁶ = 39497197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39497201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19748630 + 19748631.

It is an arithmetic number, because the mean of its divisors is an integer number (19748631).

Almost surely, 2^39497261 is an apocalyptic number.

It is an amenable number.

39497261 is a deficient number, since it is larger than the sum of its proper divisors (1).

39497261 is an equidigital number, since it uses as much as digits as its factorization.

39497261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 39497261 is about 6284.6846380706. The cubic root of 39497261 is about 340.5563584267.

The spelling of 39497261 in words is "thirty-nine million, four hundred ninety-seven thousand, two hundred sixty-one".