1222423997 has 2 divisors, whose sum is σ = 1222423998. Its totient is φ = 1222423996.

The previous prime is 1222423933. The next prime is 1222424003. The reversal of 1222423997 is 7993242221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101841636 + 120582361 = 33194^2 + 10981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222423997 - 2⁶ = 1222423933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222423927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611211998 + 611211999.

It is an arithmetic number, because the mean of its divisors is an integer number (611211999).

Almost surely, 2^1222423997 is an apocalyptic number.

It is an amenable number.

1222423997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222423997 is an equidigital number, since it uses as much as digits as its factorization.

1222423997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 1222423997 is about 34963.1805904440. The cubic root of 1222423997 is about 1069.2369430818.

The spelling of 1222423997 in words is "one billion, two hundred twenty-two million, four hundred twenty-three thousand, nine hundred ninety-seven".