61889073 has 4 divisors (see below), whose sum is σ = 82518768. Its totient is φ = 41259380.

The previous prime is 61889059. The next prime is 61889101. The reversal of 61889073 is 37098816.

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 a de Polignac number, because none of the positive numbers 2^k-61889073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61889273) 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, 10314843 + ... + 10314848.

It is an arithmetic number, because the mean of its divisors is an integer number (20629692).

Almost surely, 2^61889073 is an apocalyptic number.

It is an amenable number.

61889073 is a deficient number, since it is larger than the sum of its proper divisors (20629695).

61889073 is a wasteful number, since it uses less digits than its factorization.

61889073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20629694.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 61889073 is about 7866.9608490191. The cubic root of 61889073 is about 395.5529786364.

The spelling of 61889073 in words is "sixty-one million, eight hundred eighty-nine thousand, seventy-three".