149869993 has 8 divisors (see below), whose sum is σ = 184455488. Its totient is φ = 118578384.

The previous prime is 149869987. The next prime is 149870003. The reversal of 149869993 is 399968941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149869993 - 2⁹ = 149869481 is a prime.

It is a super-2 number, since 2×149869993² = 44922029603640098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149869963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823371 + ... + 823552.

It is an arithmetic number, because the mean of its divisors is an integer number (23056936).

Almost surely, 2^149869993 is an apocalyptic number.

149869993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

149869993 is a deficient number, since it is larger than the sum of its proper divisors (34585495).

149869993 is a wasteful number, since it uses less digits than its factorization.

149869993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646943.

The product of its digits is 3779136, while the sum is 58.

The square root of 149869993 is about 12242.1400498442. The cubic root of 149869993 is about 531.1757368303.

The spelling of 149869993 in words is "one hundred forty-nine million, eight hundred sixty-nine thousand, nine hundred ninety-three".