154843049 has 4 divisors (see below), whose sum is σ = 154974036. Its totient is φ = 154712064.

The previous prime is 154843033. The next prime is 154843079. The reversal of 154843049 is 940348451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107329600 + 47513449 = 10360^2 + 6893^2 .

It is a cyclic number.

It is not a de Polignac number, because 154843049 - 2⁴ = 154843033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154843009) 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, 63704 + ... + 66089.

It is an arithmetic number, because the mean of its divisors is an integer number (38743509).

Almost surely, 2^154843049 is an apocalyptic number.

It is an amenable number.

154843049 is a deficient number, since it is larger than the sum of its proper divisors (130987).

154843049 is a wasteful number, since it uses less digits than its factorization.

154843049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130986.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 154843049 is about 12443.5946976748. The cubic root of 154843049 is about 536.9871642867.

The spelling of 154843049 in words is "one hundred fifty-four million, eight hundred forty-three thousand, forty-nine".