1616322993 has 8 divisors (see below), whose sum is σ = 2181062688. Its totient is φ = 1064565984.

The previous prime is 1616322979. The next prime is 1616323013. The reversal of 1616322993 is 3992236161.

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 1616322993 - 2¹³ = 1616314801 is a prime.

It is a super-2 number, since 2×1616322993² = 5225000035400956098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1616322973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3245380 + ... + 3245877.

It is an arithmetic number, because the mean of its divisors is an integer number (272632836).

Almost surely, 2^1616322993 is an apocalyptic number.

It is an amenable number.

1616322993 is a deficient number, since it is larger than the sum of its proper divisors (564739695).

1616322993 is an equidigital number, since it uses as much as digits as its factorization.

1616322993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491343.

The product of its digits is 104976, while the sum is 42.

The square root of 1616322993 is about 40203.5196593532. The cubic root of 1616322993 is about 1173.5710392319.

The spelling of 1616322993 in words is "one billion, six hundred sixteen million, three hundred twenty-two thousand, nine hundred ninety-three".