149642237 has 2 divisors, whose sum is σ = 149642238. Its totient is φ = 149642236.

The previous prime is 149642221. The next prime is 149642261. The reversal of 149642237 is 732246941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116337796 + 33304441 = 10786^2 + 5771^2 .

It is a cyclic number.

It is not a de Polignac number, because 149642237 - 2⁴ = 149642221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149642237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149642287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74821118 + 74821119.

It is an arithmetic number, because the mean of its divisors is an integer number (74821119).

Almost surely, 2^149642237 is an apocalyptic number.

It is an amenable number.

149642237 is a deficient number, since it is larger than the sum of its proper divisors (1).

149642237 is an equidigital number, since it uses as much as digits as its factorization.

149642237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 149642237 is about 12232.8343812871. The cubic root of 149642237 is about 530.9065261770.

The spelling of 149642237 in words is "one hundred forty-nine million, six hundred forty-two thousand, two hundred thirty-seven".