94028637221 has 4 divisors (see below), whose sum is σ = 94071128652. Its totient is φ = 93986145792.

The previous prime is 94028637163. The next prime is 94028637223. The reversal of 94028637221 is 12273682049.

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 68979244321 + 25049392900 = 262639^2 + 158270^2 .

It is a cyclic number.

It is not a de Polignac number, because 94028637221 - 2¹⁰ = 94028636197 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 (94028637223) 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, 21242396 + ... + 21246821.

It is an arithmetic number, because the mean of its divisors is an integer number (23517782163).

Almost surely, 2^94028637221 is an apocalyptic number.

It is an amenable number.

94028637221 is a deficient number, since it is larger than the sum of its proper divisors (42491431).

94028637221 is a wasteful number, since it uses less digits than its factorization.

94028637221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42491430.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 94028637221 in words is "ninety-four billion, twenty-eight million, six hundred thirty-seven thousand, two hundred twenty-one".