149968643 has 4 divisors (see below), whose sum is σ = 163602168. Its totient is φ = 136335120.

The previous prime is 149968613. The next prime is 149968661. The reversal of 149968643 is 346869941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346869941 = 11 ⋅31533631.

It is a cyclic number.

It is not a de Polignac number, because 149968643 - 2¹⁰ = 149967619 is a prime.

It is a super-2 number, since 2×149968643² = 44981187766522898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149968591 and 149968600.

It is not an unprimeable number, because it can be changed into a prime (149968613) 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, 6816746 + ... + 6816767.

It is an arithmetic number, because the mean of its divisors is an integer number (40900542).

Almost surely, 2^149968643 is an apocalyptic number.

149968643 is a deficient number, since it is larger than the sum of its proper divisors (13633525).

149968643 is a wasteful number, since it uses less digits than its factorization.

149968643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13633524.

The product of its digits is 1119744, while the sum is 50.

The square root of 149968643 is about 12246.1685028420. The cubic root of 149968643 is about 531.2922578058.

The spelling of 149968643 in words is "one hundred forty-nine million, nine hundred sixty-eight thousand, six hundred forty-three".