178142449 has 2 divisors, whose sum is σ = 178142450. Its totient is φ = 178142448.

The previous prime is 178142443. The next prime is 178142467. The reversal of 178142449 is 944241871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140541025 + 37601424 = 11855^2 + 6132^2 .

It is a cyclic number.

It is not a de Polignac number, because 178142449 - 2¹⁷ = 178011377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (178142443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89071224 + 89071225.

It is an arithmetic number, because the mean of its divisors is an integer number (89071225).

Almost surely, 2^178142449 is an apocalyptic number.

It is an amenable number.

178142449 is a deficient number, since it is larger than the sum of its proper divisors (1).

178142449 is an equidigital number, since it uses as much as digits as its factorization.

178142449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 178142449 is about 13347.0014984640. The cubic root of 178142449 is about 562.6726504755.

Subtracting from 178142449 its sum of digits (40), we obtain a square (178142409 = 13347²).

The spelling of 178142449 in words is "one hundred seventy-eight million, one hundred forty-two thousand, four hundred forty-nine".