45220979 has 2 divisors, whose sum is σ = 45220980. Its totient is φ = 45220978.

The previous prime is 45220961. The next prime is 45221021. The reversal of 45220979 is 97902254.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45220979 - 2¹² = 45216883 is a prime.

It is not a weakly prime, because it can be changed into another prime (45220079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610489 + 22610490.

It is an arithmetic number, because the mean of its divisors is an integer number (22610490).

Almost surely, 2^45220979 is an apocalyptic number.

45220979 is a deficient number, since it is larger than the sum of its proper divisors (1).

45220979 is an equidigital number, since it uses as much as digits as its factorization.

45220979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 45220979 is about 6724.6545636189. The cubic root of 45220979 is about 356.2706012915.

The spelling of 45220979 in words is "forty-five million, two hundred twenty thousand, nine hundred seventy-nine".