149897633 has 2 divisors, whose sum is σ = 149897634. Its totient is φ = 149897632.

The previous prime is 149897623. The next prime is 149897641. The reversal of 149897633 is 336798941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130599184 + 19298449 = 11428^2 + 4393^2 .

It is a cyclic number.

It is not a de Polignac number, because 149897633 - 2¹² = 149893537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (149897603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74948816 + 74948817.

It is an arithmetic number, because the mean of its divisors is an integer number (74948817).

Almost surely, 2^149897633 is an apocalyptic number.

It is an amenable number.

149897633 is a deficient number, since it is larger than the sum of its proper divisors (1).

149897633 is an equidigital number, since it uses as much as digits as its factorization.

149897633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 149897633 is about 12243.2688853917. The cubic root of 149897633 is about 531.2083891192.

It can be divided in two parts, 14989 and 7633, that added together give a palindrome (22622).

The spelling of 149897633 in words is "one hundred forty-nine million, eight hundred ninety-seven thousand, six hundred thirty-three".