61504519 has 2 divisors, whose sum is σ = 61504520. Its totient is φ = 61504518.

The previous prime is 61504517. The next prime is 61504523. The reversal of 61504519 is 91540516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61504519 - 2¹ = 61504517 is a prime.

It is a super-2 number, since 2×61504519² = 7565611714842722, which contains 22 as substring.

Together with 61504517, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61504517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30752259 + 30752260.

It is an arithmetic number, because the mean of its divisors is an integer number (30752260).

Almost surely, 2^61504519 is an apocalyptic number.

61504519 is a deficient number, since it is larger than the sum of its proper divisors (1).

61504519 is an equidigital number, since it uses as much as digits as its factorization.

61504519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 61504519 is about 7842.4816863031. The cubic root of 61504519 is about 394.7320064346.

The spelling of 61504519 in words is "sixty-one million, five hundred four thousand, five hundred nineteen".