61513793 has 4 divisors (see below), whose sum is σ = 67105968. Its totient is φ = 55921620.

The previous prime is 61513789. The next prime is 61513807. The reversal of 61513793 is 39731516.

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 61513793 - 2² = 61513789 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 (61513723) 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, 2796071 + ... + 2796092.

It is an arithmetic number, because the mean of its divisors is an integer number (16776492).

Almost surely, 2^61513793 is an apocalyptic number.

It is an amenable number.

61513793 is a deficient number, since it is larger than the sum of its proper divisors (5592175).

61513793 is a wasteful number, since it uses less digits than its factorization.

61513793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592174.

The product of its digits is 17010, while the sum is 35.

The square root of 61513793 is about 7843.0729309372. The cubic root of 61513793 is about 394.7518454140.

The spelling of 61513793 in words is "sixty-one million, five hundred thirteen thousand, seven hundred ninety-three".