1222658387 has 2 divisors, whose sum is σ = 1222658388. Its totient is φ = 1222658386.

The previous prime is 1222658369. The next prime is 1222658401. The reversal of 1222658387 is 7838562221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222658387 - 2²⁰ = 1221609811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222658347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611329193 + 611329194.

It is an arithmetic number, because the mean of its divisors is an integer number (611329194).

Almost surely, 2^1222658387 is an apocalyptic number.

1222658387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222658387 is an equidigital number, since it uses as much as digits as its factorization.

1222658387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 1222658387 is about 34966.5323845531. The cubic root of 1222658387 is about 1069.3052779180.

The spelling of 1222658387 in words is "one billion, two hundred twenty-two million, six hundred fifty-eight thousand, three hundred eighty-seven".