61590993 has 4 divisors (see below), whose sum is σ = 82121328. Its totient is φ = 41060660.

The previous prime is 61590973. The next prime is 61591001. The reversal of 61590993 is 39909516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61590993 - 2⁵ = 61590961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61590923) 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, 10265163 + ... + 10265168.

It is an arithmetic number, because the mean of its divisors is an integer number (20530332).

Almost surely, 2^61590993 is an apocalyptic number.

It is an amenable number.

61590993 is a deficient number, since it is larger than the sum of its proper divisors (20530335).

61590993 is a wasteful number, since it uses less digits than its factorization.

61590993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20530334.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 61590993 is about 7847.9929281314. The cubic root of 61590993 is about 394.9169146404.

The spelling of 61590993 in words is "sixty-one million, five hundred ninety thousand, nine hundred ninety-three".