2172501739 has 2 divisors, whose sum is σ = 2172501740. Its totient is φ = 2172501738.

The previous prime is 2172501713. The next prime is 2172501803. The reversal of 2172501739 is 9371052712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172501739 - 2⁵ = 2172501707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2172501698 and 2172501707.

It is not a weakly prime, because it can be changed into another prime (2172501839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086250869 + 1086250870.

It is an arithmetic number, because the mean of its divisors is an integer number (1086250870).

Almost surely, 2^2172501739 is an apocalyptic number.

2172501739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172501739 is an equidigital number, since it uses as much as digits as its factorization.

2172501739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 2172501739 is about 46610.1034004431. The cubic root of 2172501739 is about 1295.1499235597.

The spelling of 2172501739 in words is "two billion, one hundred seventy-two million, five hundred one thousand, seven hundred thirty-nine".