1239622993 has 4 divisors (see below), whose sum is σ = 1416712000. Its totient is φ = 1062533988.

The previous prime is 1239622961. The next prime is 1239622999. The reversal of 1239622993 is 3992269321.

It is a happy number.

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 1239622993 - 2⁵ = 1239622961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239622999) 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, 88544493 + ... + 88544506.

It is an arithmetic number, because the mean of its divisors is an integer number (354178000).

Almost surely, 2^1239622993 is an apocalyptic number.

It is an amenable number.

1239622993 is a deficient number, since it is larger than the sum of its proper divisors (177089007).

1239622993 is an equidigital number, since it uses as much as digits as its factorization.

1239622993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177089006.

The product of its digits is 314928, while the sum is 46.

The square root of 1239622993 is about 35208.2801766857. The cubic root of 1239622993 is about 1074.2281802224.

The spelling of 1239622993 in words is "one billion, two hundred thirty-nine million, six hundred twenty-two thousand, nine hundred ninety-three".