149633819 has 2 divisors, whose sum is σ = 149633820. Its totient is φ = 149633818.

The previous prime is 149633789. The next prime is 149633839. The reversal of 149633819 is 918336941.

It is a strong prime.

It is an emirp because it is prime and its reverse (918336941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149633819 is a prime.

It is a super-2 number, since 2×149633819² = 44780559577049522, which contains 22 as substring.

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 149633819.

It is not a weakly prime, because it can be changed into another prime (149633839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74816909 + 74816910.

It is an arithmetic number, because the mean of its divisors is an integer number (74816910).

Almost surely, 2^149633819 is an apocalyptic number.

149633819 is a deficient number, since it is larger than the sum of its proper divisors (1).

149633819 is an equidigital number, since it uses as much as digits as its factorization.

149633819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 149633819 is about 12232.4903024691. The cubic root of 149633819 is about 530.8965707548.

The spelling of 149633819 in words is "one hundred forty-nine million, six hundred thirty-three thousand, eight hundred nineteen".