149868993 has 4 divisors (see below), whose sum is σ = 199825328. Its totient is φ = 99912660.

The previous prime is 149868967. The next prime is 149869019. The reversal of 149868993 is 399868941.

149868993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (149868967) and next prime (149869019).

It is not a de Polignac number, because 149868993 - 2¹⁴ = 149852609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149868793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24978163 + ... + 24978168.

It is an arithmetic number, because the mean of its divisors is an integer number (49956332).

Almost surely, 2^149868993 is an apocalyptic number.

It is an amenable number.

149868993 is a deficient number, since it is larger than the sum of its proper divisors (49956335).

149868993 is an equidigital number, since it uses as much as digits as its factorization.

149868993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49956334.

The product of its digits is 3359232, while the sum is 57.

The square root of 149868993 is about 12242.0992072438. The cubic root of 149868993 is about 531.1745554132.

The spelling of 149868993 in words is "one hundred forty-nine million, eight hundred sixty-eight thousand, nine hundred ninety-three".