149881619 has 2 divisors, whose sum is σ = 149881620. Its totient is φ = 149881618.

The previous prime is 149881603. The next prime is 149881631. The reversal of 149881619 is 916188941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149881619 - 2⁴ = 149881603 is a prime.

It is a super-2 number, since 2×149881619² = 44928999428122322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149881679) 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, 74940809 + 74940810.

It is an arithmetic number, because the mean of its divisors is an integer number (74940810).

Almost surely, 2^149881619 is an apocalyptic number.

149881619 is a deficient number, since it is larger than the sum of its proper divisors (1).

149881619 is an equidigital number, since it uses as much as digits as its factorization.

149881619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 47.

The square root of 149881619 is about 12242.6148759160. The cubic root of 149881619 is about 531.1894715999.

The spelling of 149881619 in words is "one hundred forty-nine million, eight hundred eighty-one thousand, six hundred nineteen".