45149849 has 4 divisors (see below), whose sum is σ = 45177636. Its totient is φ = 45122064.

The previous prime is 45149791. The next prime is 45149861. The reversal of 45149849 is 94894154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94894154 = 2 ⋅47447077.

It can be written as a sum of positive squares in 2 ways, for example, as 29626249 + 15523600 = 5443^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 45149849 - 2¹² = 45145753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45149749) 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, 11294 + ... + 14759.

It is an arithmetic number, because the mean of its divisors is an integer number (11294409).

Almost surely, 2^45149849 is an apocalyptic number.

It is an amenable number.

45149849 is a deficient number, since it is larger than the sum of its proper divisors (27787).

45149849 is a wasteful number, since it uses less digits than its factorization.

45149849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27786.

The product of its digits is 207360, while the sum is 44.

The square root of 45149849 is about 6719.3637347594. The cubic root of 45149849 is about 356.0837055410.

The spelling of 45149849 in words is "forty-five million, one hundred forty-nine thousand, eight hundred forty-nine".