61893789 has 4 divisors (see below), whose sum is σ = 82525056. Its totient is φ = 41262524.

The previous prime is 61893779. The next prime is 61893809. The reversal of 61893789 is 98739816.

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 61893789 - 2⁷ = 61893661 is a prime.

It is a super-2 number, since 2×61893789² = 7661682233553042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61893779) 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, 10315629 + ... + 10315634.

It is an arithmetic number, because the mean of its divisors is an integer number (20631264).

Almost surely, 2^61893789 is an apocalyptic number.

It is an amenable number.

61893789 is a deficient number, since it is larger than the sum of its proper divisors (20631267).

61893789 is a wasteful number, since it uses less digits than its factorization.

61893789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20631266.

The product of its digits is 653184, while the sum is 51.

The square root of 61893789 is about 7867.2605778632. The cubic root of 61893789 is about 395.5630255390.

The spelling of 61893789 in words is "sixty-one million, eight hundred ninety-three thousand, seven hundred eighty-nine".