61146149 has 2 divisors, whose sum is σ = 61146150. Its totient is φ = 61146148.

The previous prime is 61146131. The next prime is 61146157. The reversal of 61146149 is 94164116.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39150049 + 21996100 = 6257^2 + 4690^2 .

It is a cyclic number.

It is not a de Polignac number, because 61146149 - 2⁸ = 61145893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61146109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30573074 + 30573075.

It is an arithmetic number, because the mean of its divisors is an integer number (30573075).

Almost surely, 2^61146149 is an apocalyptic number.

It is an amenable number.

61146149 is a deficient number, since it is larger than the sum of its proper divisors (1).

61146149 is an equidigital number, since it uses as much as digits as its factorization.

61146149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 61146149 is about 7819.6003094787. The cubic root of 61146149 is about 393.9638474219.

The spelling of 61146149 in words is "sixty-one million, one hundred forty-six thousand, one hundred forty-nine".