2135724839 has 2 divisors, whose sum is σ = 2135724840. Its totient is φ = 2135724838.

The previous prime is 2135724821. The next prime is 2135724847. The reversal of 2135724839 is 9384275312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2135724839 is a prime.

It is a super-2 number, since 2×2135724839² = 9122641175843151842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2135724839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135724439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067862419 + 1067862420.

It is an arithmetic number, because the mean of its divisors is an integer number (1067862420).

Almost surely, 2^2135724839 is an apocalyptic number.

2135724839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135724839 is an equidigital number, since it uses as much as digits as its factorization.

2135724839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 2135724839 is about 46213.9030920350. The cubic root of 2135724839 is about 1287.8000359473.

The spelling of 2135724839 in words is "two billion, one hundred thirty-five million, seven hundred twenty-four thousand, eight hundred thirty-nine".