61944447 has 16 divisors (see below), whose sum is σ = 88687872. Its totient is φ = 38317440.

The previous prime is 61944431. The next prime is 61944457. The reversal of 61944447 is 74444916.

It is not a de Polignac number, because 61944447 - 2⁴ = 61944431 is a prime.

It is a super-2 number, since 2×61944447² = 7674229028271618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61944457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4933 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (5542992).

Almost surely, 2^61944447 is an apocalyptic number.

61944447 is a deficient number, since it is larger than the sum of its proper divisors (26743425).

61944447 is a wasteful number, since it uses less digits than its factorization.

61944447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17198.

The product of its digits is 96768, while the sum is 39.

The square root of 61944447 is about 7870.4794644291. The cubic root of 61944447 is about 395.6709144868.

The spelling of 61944447 in words is "sixty-one million, nine hundred forty-four thousand, four hundred forty-seven".