61701149 has 2 divisors, whose sum is σ = 61701150. Its totient is φ = 61701148.

The previous prime is 61701139. The next prime is 61701181. The reversal of 61701149 is 94110716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58033924 + 3667225 = 7618^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 61701149 - 2²⁰ = 60652573 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (61701139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30850574 + 30850575.

It is an arithmetic number, because the mean of its divisors is an integer number (30850575).

Almost surely, 2^61701149 is an apocalyptic number.

It is an amenable number.

61701149 is a deficient number, since it is larger than the sum of its proper divisors (1).

61701149 is an equidigital number, since it uses as much as digits as its factorization.

61701149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 61701149 is about 7855.0078930578. The cubic root of 61701149 is about 395.1522118077.

The spelling of 61701149 in words is "sixty-one million, seven hundred one thousand, one hundred forty-nine".