61722689 has 8 divisors (see below), whose sum is σ = 70802688. Its totient is φ = 52708320.

The previous prime is 61722679. The next prime is 61722691. The reversal of 61722689 is 98622716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61722689 - 2⁸ = 61722433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61722679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14372 + ... + 18165.

It is an arithmetic number, because the mean of its divisors is an integer number (8850336).

Almost surely, 2^61722689 is an apocalyptic number.

It is an amenable number.

61722689 is a deficient number, since it is larger than the sum of its proper divisors (9079999).

61722689 is a wasteful number, since it uses less digits than its factorization.

61722689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32815.

The product of its digits is 72576, while the sum is 41.

The square root of 61722689 is about 7856.3788732469. The cubic root of 61722689 is about 395.1981892787.

The spelling of 61722689 in words is "sixty-one million, seven hundred twenty-two thousand, six hundred eighty-nine".