45723821 has 8 divisors (see below), whose sum is σ = 53717664. Its totient is φ = 38369520.

The previous prime is 45723817. The next prime is 45723827. The reversal of 45723821 is 12832754.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45723821 - 2² = 45723817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45723827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159731 + ... + 160016.

It is an arithmetic number, because the mean of its divisors is an integer number (6714708).

Almost surely, 2^45723821 is an apocalyptic number.

It is an amenable number.

45723821 is a deficient number, since it is larger than the sum of its proper divisors (7993843).

45723821 is a wasteful number, since it uses less digits than its factorization.

45723821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319771.

The product of its digits is 13440, while the sum is 32.

The square root of 45723821 is about 6761.9391449495. The cubic root of 45723821 is about 357.5862728850.

The spelling of 45723821 in words is "forty-five million, seven hundred twenty-three thousand, eight hundred twenty-one".