45099979 has 4 divisors (see below), whose sum is σ = 45950976. Its totient is φ = 44248984.

The previous prime is 45099973. The next prime is 45100007. The reversal of 45099979 is 97999054.

45099979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97999054 = 2 ⋅48999527.

It is a cyclic number.

It is not a de Polignac number, because 45099979 - 2⁷ = 45099851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45099973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425419 + ... + 425524.

It is an arithmetic number, because the mean of its divisors is an integer number (11487744).

Almost surely, 2^45099979 is an apocalyptic number.

45099979 is a deficient number, since it is larger than the sum of its proper divisors (850997).

45099979 is an equidigital number, since it uses as much as digits as its factorization.

45099979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850996.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 45099979 is about 6715.6517926408. The cubic root of 45099979 is about 355.9525538545.

The spelling of 45099979 in words is "forty-five million, ninety-nine thousand, nine hundred seventy-nine".