172952389499 has 4 divisors (see below), whose sum is σ = 176974538136. Its totient is φ = 168930240864.

The previous prime is 172952389469. The next prime is 172952389567. The reversal of 172952389499 is 994983259271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172952389499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172952389459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011074254 + ... + 2011074339.

It is an arithmetic number, because the mean of its divisors is an integer number (44243634534).

Almost surely, 2^172952389499 is an apocalyptic number.

172952389499 is a deficient number, since it is larger than the sum of its proper divisors (4022148637).

172952389499 is an equidigital number, since it uses as much as digits as its factorization.

172952389499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022148636.

The product of its digits is 88179840, while the sum is 68.

The spelling of 172952389499 in words is "one hundred seventy-two billion, nine hundred fifty-two million, three hundred eighty-nine thousand, four hundred ninety-nine".