172999051 has 2 divisors, whose sum is σ = 172999052. Its totient is φ = 172999050.

The previous prime is 172998997. The next prime is 172999061. The reversal of 172999051 is 150999271.

172999051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (150999271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172999051 - 2¹¹ = 172997003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172998989 and 172999007.

It is not a weakly prime, because it can be changed into another prime (172999061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86499525 + 86499526.

It is an arithmetic number, because the mean of its divisors is an integer number (86499526).

Almost surely, 2^172999051 is an apocalyptic number.

172999051 is a deficient number, since it is larger than the sum of its proper divisors (1).

172999051 is an equidigital number, since it uses as much as digits as its factorization.

172999051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 172999051 is about 13152.9103623495. The cubic root of 172999051 is about 557.2044466931.

The spelling of 172999051 in words is "one hundred seventy-two million, nine hundred ninety-nine thousand, fifty-one".