45821491 has 2 divisors, whose sum is σ = 45821492. Its totient is φ = 45821490.

The previous prime is 45821471. The next prime is 45821509. The reversal of 45821491 is 19412854.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45821491 - 2⁹ = 45820979 is a prime.

It is not a weakly prime, because it can be changed into another prime (45821401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22910745 + 22910746.

It is an arithmetic number, because the mean of its divisors is an integer number (22910746).

Almost surely, 2^45821491 is an apocalyptic number.

45821491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45821491 is an equidigital number, since it uses as much as digits as its factorization.

45821491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 45821491 is about 6769.1573330807. The cubic root of 45821491 is about 357.8407034499.

The spelling of 45821491 in words is "forty-five million, eight hundred twenty-one thousand, four hundred ninety-one".