61097917 has 4 divisors (see below), whose sum is σ = 61127136. Its totient is φ = 61068700.

The previous prime is 61097899. The next prime is 61097921. The reversal of 61097917 is 71979016.

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 61097917 - 2¹⁵ = 61065149 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 61097917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61097947) 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, 11209 + ... + 15742.

It is an arithmetic number, because the mean of its divisors is an integer number (15281784).

Almost surely, 2^61097917 is an apocalyptic number.

It is an amenable number.

61097917 is a deficient number, since it is larger than the sum of its proper divisors (29219).

61097917 is a wasteful number, since it uses less digits than its factorization.

61097917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29218.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 61097917 is about 7816.5156559685. The cubic root of 61097917 is about 393.8602341230.

The spelling of 61097917 in words is "sixty-one million, ninety-seven thousand, nine hundred seventeen".