149942993 has 4 divisors (see below), whose sum is σ = 151087728. Its totient is φ = 148798260.

The previous prime is 149942951. The next prime is 149942999. The reversal of 149942993 is 399249941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 399249941 = 61 ⋅6545081.

It is a cyclic number.

It is not a de Polignac number, because 149942993 - 2¹⁰ = 149941969 is a prime.

It is a super-2 number, since 2×149942993² = 44965802299596098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149942999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572171 + ... + 572432.

It is an arithmetic number, because the mean of its divisors is an integer number (37771932).

Almost surely, 2^149942993 is an apocalyptic number.

It is an amenable number.

149942993 is a deficient number, since it is larger than the sum of its proper divisors (1144735).

149942993 is a wasteful number, since it uses less digits than its factorization.

149942993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144734.

The product of its digits is 629856, while the sum is 50.

The square root of 149942993 is about 12245.1211917237. The cubic root of 149942993 is about 531.2619660880.

The spelling of 149942993 in words is "one hundred forty-nine million, nine hundred forty-two thousand, nine hundred ninety-three".