172979119 has 2 divisors, whose sum is σ = 172979120. Its totient is φ = 172979118.

The previous prime is 172979117. The next prime is 172979143. The reversal of 172979119 is 911979271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172979119 - 2¹ = 172979117 is a prime.

It is a super-2 number, since 2×172979119² = 59843551220032322, which contains 22 as substring.

Together with 172979117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172979117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86489559 + 86489560.

It is an arithmetic number, because the mean of its divisors is an integer number (86489560).

Almost surely, 2^172979119 is an apocalyptic number.

172979119 is a deficient number, since it is larger than the sum of its proper divisors (1).

172979119 is an equidigital number, since it uses as much as digits as its factorization.

172979119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 46.

The square root of 172979119 is about 13152.1526374963. The cubic root of 172979119 is about 557.1830465264.

The spelling of 172979119 in words is "one hundred seventy-two million, nine hundred seventy-nine thousand, one hundred nineteen".