2158783399 has 2 divisors, whose sum is σ = 2158783400. Its totient is φ = 2158783398.

The previous prime is 2158783397. The next prime is 2158783409. The reversal of 2158783399 is 9933878512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2158783399 - 2¹ = 2158783397 is a prime.

Together with 2158783397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158783397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079391699 + 1079391700.

It is an arithmetic number, because the mean of its divisors is an integer number (1079391700).

Almost surely, 2^2158783399 is an apocalyptic number.

2158783399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158783399 is an equidigital number, since it uses as much as digits as its factorization.

2158783399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 55.

The square root of 2158783399 is about 46462.7097681571. The cubic root of 2158783399 is about 1292.4180751623.

The spelling of 2158783399 in words is "two billion, one hundred fifty-eight million, seven hundred eighty-three thousand, three hundred ninety-nine".