149943631 has 2 divisors, whose sum is σ = 149943632. Its totient is φ = 149943630.

The previous prime is 149943613. The next prime is 149943637. The reversal of 149943631 is 136349941.

Together with previous prime (149943613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149943631 - 2⁷ = 149943503 is a prime.

It is a super-2 number, since 2×149943631² = 44966184954928322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149943637) 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, 74971815 + 74971816.

It is an arithmetic number, because the mean of its divisors is an integer number (74971816).

Almost surely, 2^149943631 is an apocalyptic number.

149943631 is a deficient number, since it is larger than the sum of its proper divisors (1).

149943631 is an equidigital number, since it uses as much as digits as its factorization.

149943631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 149943631 is about 12245.1472428877. The cubic root of 149943631 is about 531.2627195847.

The spelling of 149943631 in words is "one hundred forty-nine million, nine hundred forty-three thousand, six hundred thirty-one".