1222998977 has 2 divisors, whose sum is σ = 1222998978. Its totient is φ = 1222998976.

The previous prime is 1222998971. The next prime is 1222998983. The reversal of 1222998977 is 7798992221.

It is a balanced prime because it is at equal distance from previous prime (1222998971) and next prime (1222998983).

It can be written as a sum of positive squares in only one way, i.e., 693584896 + 529414081 = 26336^2 + 23009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222998977 - 2⁴ = 1222998961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222998971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611499488 + 611499489.

It is an arithmetic number, because the mean of its divisors is an integer number (611499489).

Almost surely, 2^1222998977 is an apocalyptic number.

It is an amenable number.

1222998977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222998977 is an equidigital number, since it uses as much as digits as its factorization.

1222998977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 1222998977 is about 34971.4022738580. The cubic root of 1222998977 is about 1069.4045590899.

The spelling of 1222998977 in words is "one billion, two hundred twenty-two million, nine hundred ninety-eight thousand, nine hundred seventy-seven".