61590013 has 4 divisors (see below), whose sum is σ = 61671708. Its totient is φ = 61508320.

The previous prime is 61590007. The next prime is 61590029. The reversal of 61590013 is 31009516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7963684 + 53626329 = 2822^2 + 7323^2 .

It is a cyclic number.

It is not a de Polignac number, because 61590013 - 2²¹ = 59492861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61590013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61590313) 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, 39706 + ... + 41227.

It is an arithmetic number, because the mean of its divisors is an integer number (15417927).

Almost surely, 2^61590013 is an apocalyptic number.

It is an amenable number.

61590013 is a deficient number, since it is larger than the sum of its proper divisors (81695).

61590013 is an equidigital number, since it uses as much as digits as its factorization.

61590013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81694.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 61590013 is about 7847.9304915372. The cubic root of 61590013 is about 394.9148200667.

Adding to 61590013 its reverse (31009516), we get a palindrome (92599529).

The spelling of 61590013 in words is "sixty-one million, five hundred ninety thousand, thirteen".