61144459 has 2 divisors, whose sum is σ = 61144460. Its totient is φ = 61144458.

The previous prime is 61144439. The next prime is 61144477. The reversal of 61144459 is 95444116.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61144459 - 2⁷ = 61144331 is a prime.

It is not a weakly prime, because it can be changed into another prime (61144429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572229 + 30572230.

It is an arithmetic number, because the mean of its divisors is an integer number (30572230).

Almost surely, 2^61144459 is an apocalyptic number.

61144459 is a deficient number, since it is larger than the sum of its proper divisors (1).

61144459 is an equidigital number, since it uses as much as digits as its factorization.

61144459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 61144459 is about 7819.4922469429. The cubic root of 61144459 is about 393.9602178391.

The spelling of 61144459 in words is "sixty-one million, one hundred forty-four thousand, four hundred fifty-nine".