61722413 has 4 divisors (see below), whose sum is σ = 62333628. Its totient is φ = 61111200.

The previous prime is 61722391. The next prime is 61722433. The reversal of 61722413 is 31422716.

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 57714409 + 4008004 = 7597^2 + 2002^2 .

It is a cyclic number.

It is not a de Polignac number, because 61722413 - 2¹⁰ = 61721389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61722433) 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, 305456 + ... + 305657.

It is an arithmetic number, because the mean of its divisors is an integer number (15583407).

Almost surely, 2^61722413 is an apocalyptic number.

It is an amenable number.

61722413 is a deficient number, since it is larger than the sum of its proper divisors (611215).

61722413 is a wasteful number, since it uses less digits than its factorization.

61722413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611214.

The product of its digits is 2016, while the sum is 26.

The square root of 61722413 is about 7856.3613078829. The cubic root of 61722413 is about 395.1976002200.

The spelling of 61722413 in words is "sixty-one million, seven hundred twenty-two thousand, four hundred thirteen".