61512593 has 4 divisors (see below), whose sum is σ = 61528548. Its totient is φ = 61496640.

The previous prime is 61512571. The next prime is 61512601. The reversal of 61512593 is 39521516.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 50865424 + 10647169 = 7132^2 + 3263^2 .

It is a cyclic number.

It is not a de Polignac number, because 61512593 - 2⁸ = 61512337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61512193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805 + ... + 11237.

It is an arithmetic number, because the mean of its divisors is an integer number (15382137).

Almost surely, 2^61512593 is an apocalyptic number.

It is an amenable number.

61512593 is a deficient number, since it is larger than the sum of its proper divisors (15955).

61512593 is an equidigital number, since it uses as much as digits as its factorization.

61512593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15954.

The product of its digits is 8100, while the sum is 32.

The square root of 61512593 is about 7842.9964299367. The cubic root of 61512593 is about 394.7492784813.

The spelling of 61512593 in words is "sixty-one million, five hundred twelve thousand, five hundred ninety-three".