914139221 has 2 divisors, whose sum is σ = 914139222. Its totient is φ = 914139220.

The previous prime is 914139167. The next prime is 914139227. The reversal of 914139221 is 122931419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 562164100 + 351975121 = 23710^2 + 18761^2 .

It is a cyclic number.

It is not a de Polignac number, because 914139221 - 2¹⁸ = 913877077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (914139227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457069610 + 457069611.

It is an arithmetic number, because the mean of its divisors is an integer number (457069611).

Almost surely, 2^914139221 is an apocalyptic number.

It is an amenable number.

914139221 is a deficient number, since it is larger than the sum of its proper divisors (1).

914139221 is an equidigital number, since it uses as much as digits as its factorization.

914139221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 914139221 is about 30234.7353386796. The cubic root of 914139221 is about 970.5191612755.

The spelling of 914139221 in words is "nine hundred fourteen million, one hundred thirty-nine thousand, two hundred twenty-one".