172279105949 has 8 divisors (see below), whose sum is σ = 173927476800. Its totient is φ = 170635784800.

The previous prime is 172279105883. The next prime is 172279105963. The reversal of 172279105949 is 949501972271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172279105949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172279105894 and 172279105903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172279105549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193849 + ... + 1330350.

It is an arithmetic number, because the mean of its divisors is an integer number (21740934600).

Almost surely, 2^172279105949 is an apocalyptic number.

It is an amenable number.

172279105949 is a deficient number, since it is larger than the sum of its proper divisors (1648370851).

172279105949 is a wasteful number, since it uses less digits than its factorization.

172279105949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524851.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 172279105949 in words is "one hundred seventy-two billion, two hundred seventy-nine million, one hundred five thousand, nine hundred forty-nine".