61323999 has 8 divisors (see below), whose sum is σ = 89198592. Its totient is φ = 37166040.

The previous prime is 61323991. The next prime is 61324027. The reversal of 61323999 is 99932316.

It is a happy number.

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

It is not a de Polignac number, because 61323999 - 2³ = 61323991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61323999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61323991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929119 + ... + 929184.

It is an arithmetic number, because the mean of its divisors is an integer number (11149824).

Almost surely, 2^61323999 is an apocalyptic number.

61323999 is a deficient number, since it is larger than the sum of its proper divisors (27874593).

61323999 is a wasteful number, since it uses less digits than its factorization.

61323999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858317.

The product of its digits is 78732, while the sum is 42.

The square root of 61323999 is about 7830.9641168888. The cubic root of 61323999 is about 394.3454394440.

The spelling of 61323999 in words is "sixty-one million, three hundred twenty-three thousand, nine hundred ninety-nine".