1222688387 has 2 divisors, whose sum is σ = 1222688388. Its totient is φ = 1222688386.

The previous prime is 1222688377. The next prime is 1222688393. The reversal of 1222688387 is 7838862221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7838862221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222688387 - 2⁴ = 1222688371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222688377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611344193 + 611344194.

It is an arithmetic number, because the mean of its divisors is an integer number (611344194).

Almost surely, 2^1222688387 is an apocalyptic number.

1222688387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222688387 is an equidigital number, since it uses as much as digits as its factorization.

1222688387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 47.

The square root of 1222688387 is about 34966.9613635500. The cubic root of 1222688387 is about 1069.3140235868.

The spelling of 1222688387 in words is "one billion, two hundred twenty-two million, six hundred eighty-eight thousand, three hundred eighty-seven".