61204389 has 4 divisors (see below), whose sum is σ = 81605856. Its totient is φ = 40802924.

The previous prime is 61204337. The next prime is 61204391. The reversal of 61204389 is 98340216.

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 61204389 - 2¹¹ = 61202341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61204399) 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, 10200729 + ... + 10200734.

It is an arithmetic number, because the mean of its divisors is an integer number (20401464).

Almost surely, 2^61204389 is an apocalyptic number.

It is an amenable number.

61204389 is a deficient number, since it is larger than the sum of its proper divisors (20401467).

61204389 is a wasteful number, since it uses less digits than its factorization.

61204389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20401466.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 61204389 is about 7823.3233986587. The cubic root of 61204389 is about 394.0888875869.

The spelling of 61204389 in words is "sixty-one million, two hundred four thousand, three hundred eighty-nine".