61320917 has 4 divisors (see below), whose sum is σ = 70081056. Its totient is φ = 52560780.

The previous prime is 61320869. The next prime is 61320937. The reversal of 61320917 is 71902316.

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 61320917 - 2¹⁰ = 61319893 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 61320917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61320937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4380059 + ... + 4380072.

It is an arithmetic number, because the mean of its divisors is an integer number (17520264).

Almost surely, 2^61320917 is an apocalyptic number.

It is an amenable number.

61320917 is a deficient number, since it is larger than the sum of its proper divisors (8760139).

61320917 is an equidigital number, since it uses as much as digits as its factorization.

61320917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8760138.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 61320917 is about 7830.7673314944. The cubic root of 61320917 is about 394.3388330418.

The spelling of 61320917 in words is "sixty-one million, three hundred twenty thousand, nine hundred seventeen".