61344539 has 2 divisors, whose sum is σ = 61344540. Its totient is φ = 61344538.

The previous prime is 61344529. The next prime is 61344571. The reversal of 61344539 is 93544316.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61344539 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 61344499 and 61344508.

It is not a weakly prime, because it can be changed into another prime (61344509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30672269 + 30672270.

It is an arithmetic number, because the mean of its divisors is an integer number (30672270).

Almost surely, 2^61344539 is an apocalyptic number.

61344539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61344539 is an equidigital number, since it uses as much as digits as its factorization.

61344539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 61344539 is about 7832.2754675765. The cubic root of 61344539 is about 394.3894621828.

The spelling of 61344539 in words is "sixty-one million, three hundred forty-four thousand, five hundred thirty-nine".