45996821 has 4 divisors (see below), whose sum is σ = 49535052. Its totient is φ = 42458592.

The previous prime is 45996787. The next prime is 45996823. The reversal of 45996821 is 12869954.

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 3290596 + 42706225 = 1814^2 + 6535^2 .

It is a cyclic number.

It is not a de Polignac number, because 45996821 - 2¹⁰ = 45995797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45996823) 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, 1769096 + ... + 1769121.

It is an arithmetic number, because the mean of its divisors is an integer number (12383763).

Almost surely, 2^45996821 is an apocalyptic number.

It is an amenable number.

45996821 is a deficient number, since it is larger than the sum of its proper divisors (3538231).

45996821 is a wasteful number, since it uses less digits than its factorization.

45996821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538230.

The product of its digits is 155520, while the sum is 44.

The square root of 45996821 is about 6782.0956200868. The cubic root of 45996821 is about 358.2965329193.

The spelling of 45996821 in words is "forty-five million, nine hundred ninety-six thousand, eight hundred twenty-one".