61809593 has 2 divisors, whose sum is σ = 61809594. Its totient is φ = 61809592.

The previous prime is 61809581. The next prime is 61809617. The reversal of 61809593 is 39590816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45873529 + 15936064 = 6773^2 + 3992^2 .

It is a cyclic number.

It is not a de Polignac number, because 61809593 - 2¹⁴ = 61793209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61809593.

It is not a weakly prime, because it can be changed into another prime (61809563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30904796 + 30904797.

It is an arithmetic number, because the mean of its divisors is an integer number (30904797).

Almost surely, 2^61809593 is an apocalyptic number.

It is an amenable number.

61809593 is a deficient number, since it is larger than the sum of its proper divisors (1).

61809593 is an equidigital number, since it uses as much as digits as its factorization.

61809593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 61809593 is about 7861.9077201402. The cubic root of 61809593 is about 395.3835786817.

The spelling of 61809593 in words is "sixty-one million, eight hundred nine thousand, five hundred ninety-three".