92870221 has 2 divisors, whose sum is σ = 92870222. Its totient is φ = 92870220.

The previous prime is 92870213. The next prime is 92870227. The reversal of 92870221 is 12207829.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 39375625 = 7314^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 92870221 - 2³ = 92870213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (92870227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46435110 + 46435111.

It is an arithmetic number, because the mean of its divisors is an integer number (46435111).

Almost surely, 2^92870221 is an apocalyptic number.

It is an amenable number.

92870221 is a deficient number, since it is larger than the sum of its proper divisors (1).

92870221 is an equidigital number, since it uses as much as digits as its factorization.

92870221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 92870221 is about 9636.9196842145. The cubic root of 92870221 is about 452.8546445979.

The spelling of 92870221 in words is "ninety-two million, eight hundred seventy thousand, two hundred twenty-one".