61922989 has 4 divisors (see below), whose sum is σ = 61951680. Its totient is φ = 61894300.

The previous prime is 61922977. The next prime is 61923011. The reversal of 61922989 is 98922916.

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 61922989 - 2⁹ = 61922477 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 (61922909) 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, 10819 + ... + 15520.

It is an arithmetic number, because the mean of its divisors is an integer number (15487920).

Almost surely, 2^61922989 is an apocalyptic number.

It is an amenable number.

61922989 is a deficient number, since it is larger than the sum of its proper divisors (28691).

61922989 is a wasteful number, since it uses less digits than its factorization.

61922989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28690.

The product of its digits is 139968, while the sum is 46.

The square root of 61922989 is about 7869.1161511316. The cubic root of 61922989 is about 395.6252214642.

The spelling of 61922989 in words is "sixty-one million, nine hundred twenty-two thousand, nine hundred eighty-nine".