72105739 has 2 divisors, whose sum is σ = 72105740. Its totient is φ = 72105738.

The previous prime is 72105731. The next prime is 72105751. The reversal of 72105739 is 93750127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72105739 - 2³ = 72105731 is a prime.

It is a super-2 number, since 2×72105739² = 10398475193472242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72105731) 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 as a sum of consecutive naturals, namely, 36052869 + 36052870.

It is an arithmetic number, because the mean of its divisors is an integer number (36052870).

Almost surely, 2^72105739 is an apocalyptic number.

72105739 is a deficient number, since it is larger than the sum of its proper divisors (1).

72105739 is an equidigital number, since it uses as much as digits as its factorization.

72105739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 72105739 is about 8491.5098186365. The cubic root of 72105739 is about 416.2203186849.

The spelling of 72105739 in words is "seventy-two million, one hundred five thousand, seven hundred thirty-nine".