1213322977 has 2 divisors, whose sum is σ = 1213322978. Its totient is φ = 1213322976.

The previous prime is 1213322953. The next prime is 1213322987. The reversal of 1213322977 is 7792233121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1070663841 + 142659136 = 32721^2 + 11944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213322977 - 2¹⁵ = 1213290209 is a prime.

It is a super-2 number, since 2×1213322977² = 2944305293032285058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213322947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606661488 + 606661489.

It is an arithmetic number, because the mean of its divisors is an integer number (606661489).

Almost surely, 2^1213322977 is an apocalyptic number.

It is an amenable number.

1213322977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213322977 is an equidigital number, since it uses as much as digits as its factorization.

1213322977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 1213322977 is about 34832.7859494471. The cubic root of 1213322977 is about 1066.5768194613.

The spelling of 1213322977 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, nine hundred seventy-seven".