61889669 has 8 divisors (see below), whose sum is σ = 65794080. Its totient is φ = 58050000.

The previous prime is 61889651. The next prime is 61889677. The reversal of 61889669 is 96698816.

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

It is a cyclic number.

It is not a de Polignac number, because 61889669 - 2¹² = 61885573 is a prime.

It is a super-2 number, since 2×61889669² = 7660662257859122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61889669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61883669) 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, 14207 + ... + 18044.

It is an arithmetic number, because the mean of its divisors is an integer number (8224260).

Almost surely, 2^61889669 is an apocalyptic number.

It is an amenable number.

61889669 is a deficient number, since it is larger than the sum of its proper divisors (3904411).

61889669 is a wasteful number, since it uses less digits than its factorization.

61889669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32371.

The product of its digits is 1119744, while the sum is 53.

The square root of 61889669 is about 7866.9987288673. The cubic root of 61889669 is about 395.5542483749.

The spelling of 61889669 in words is "sixty-one million, eight hundred eighty-nine thousand, six hundred sixty-nine".