172820049 has 8 divisors (see below), whose sum is σ = 230699040. Its totient is φ = 115077216.

The previous prime is 172820041. The next prime is 172820057. The reversal of 172820049 is 940028271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172820041) and next prime (172820057).

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

It is not a de Polignac number, because 172820049 - 2³ = 172820041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172820041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31039 + ... + 36180.

It is an arithmetic number, because the mean of its divisors is an integer number (28837380).

Almost surely, 2^172820049 is an apocalyptic number.

It is an amenable number.

172820049 is a deficient number, since it is larger than the sum of its proper divisors (57878991).

172820049 is an equidigital number, since it uses as much as digits as its factorization.

172820049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68079.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 172820049 is about 13146.1039475580. The cubic root of 172820049 is about 557.0122006853.

The spelling of 172820049 in words is "one hundred seventy-two million, eight hundred twenty thousand, forty-nine".