27722901 has 4 divisors (see below), whose sum is σ = 36963872. Its totient is φ = 18481932.

The previous prime is 27722899. The next prime is 27722911. The reversal of 27722901 is 10922772.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27722901 - 2¹ = 27722899 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 (27722911) 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 in 3 ways as a sum of consecutive naturals, for example, 4620481 + ... + 4620486.

It is an arithmetic number, because the mean of its divisors is an integer number (9240968).

Almost surely, 2^27722901 is an apocalyptic number.

It is an amenable number.

27722901 is a deficient number, since it is larger than the sum of its proper divisors (9240971).

27722901 is an equidigital number, since it uses as much as digits as its factorization.

27722901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240970.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 27722901 is about 5265.2541249212. The cubic root of 27722901 is about 302.6538652159.

The spelling of 27722901 in words is "twenty-seven million, seven hundred twenty-two thousand, nine hundred one".