61989441 has 4 divisors (see below), whose sum is σ = 82652592. Its totient is φ = 41326292.

The previous prime is 61989401. The next prime is 61989449. The reversal of 61989441 is 14498916.

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 61989441 - 2¹⁷ = 61858369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61989393 and 61989402.

It is not an unprimeable number, because it can be changed into a prime (61989449) 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, 10331571 + ... + 10331576.

It is an arithmetic number, because the mean of its divisors is an integer number (20663148).

Almost surely, 2^61989441 is an apocalyptic number.

It is an amenable number.

61989441 is a deficient number, since it is larger than the sum of its proper divisors (20663151).

61989441 is a wasteful number, since it uses less digits than its factorization.

61989441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20663150.

The product of its digits is 62208, while the sum is 42.

The square root of 61989441 is about 7873.3373482914. The cubic root of 61989441 is about 395.7666912099.

The spelling of 61989441 in words is "sixty-one million, nine hundred eighty-nine thousand, four hundred forty-one".