61788959 has 4 divisors (see below), whose sum is σ = 62203800. Its totient is φ = 61374120.

The previous prime is 61788953. The next prime is 61788977. The reversal of 61788959 is 95988716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61788959 - 2⁴ = 61788943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61788959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61788953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207197 + ... + 207494.

It is an arithmetic number, because the mean of its divisors is an integer number (15550950).

Almost surely, 2^61788959 is an apocalyptic number.

61788959 is a deficient number, since it is larger than the sum of its proper divisors (414841).

61788959 is a wasteful number, since it uses less digits than its factorization.

61788959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414840.

The product of its digits is 1088640, while the sum is 53.

The square root of 61788959 is about 7860.5953336882. The cubic root of 61788959 is about 395.3395765974.

The spelling of 61788959 in words is "sixty-one million, seven hundred eighty-eight thousand, nine hundred fifty-nine".