61505459 has 2 divisors, whose sum is σ = 61505460. Its totient is φ = 61505458.

The previous prime is 61505449. The next prime is 61505461. The reversal of 61505459 is 95450516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61505459 - 2⁸ = 61505203 is a prime.

Together with 61505461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61505449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30752729 + 30752730.

It is an arithmetic number, because the mean of its divisors is an integer number (30752730).

Almost surely, 2^61505459 is an apocalyptic number.

61505459 is a deficient number, since it is larger than the sum of its proper divisors (1).

61505459 is an equidigital number, since it uses as much as digits as its factorization.

61505459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 61505459 is about 7842.5416160834. The cubic root of 61505459 is about 394.7340173774.

The spelling of 61505459 in words is "sixty-one million, five hundred five thousand, four hundred fifty-nine".