1356423999 has 64 divisors (see below), whose sum is σ = 2242713600. Its totient is φ = 711659520.

The previous prime is 1356423977. The next prime is 1356424001. The reversal of 1356423999 is 9993246531.

It is not a de Polignac number, because 1356423999 - 2⁸ = 1356423743 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356423199) 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 63 ways as a sum of consecutive naturals, for example, 4333467 + ... + 4333779.

It is an arithmetic number, because the mean of its divisors is an integer number (35042400).

Almost surely, 2^1356423999 is an apocalyptic number.

1356423999 is a deficient number, since it is larger than the sum of its proper divisors (886289601).

1356423999 is a wasteful number, since it uses less digits than its factorization.

1356423999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its digits is 1574640, while the sum is 51.

The square root of 1356423999 is about 36829.6619452310. The cubic root of 1356423999 is about 1106.9597292133.

The spelling of 1356423999 in words is "one billion, three hundred fifty-six million, four hundred twenty-three thousand, nine hundred ninety-nine".