1214995777 has 2 divisors, whose sum is σ = 1214995778. Its totient is φ = 1214995776.

The previous prime is 1214995759. The next prime is 1214995811. The reversal of 1214995777 is 7775994121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203326721 + 11669056 = 34689^2 + 3416^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214995777 - 2¹¹ = 1214993729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1214995757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607497888 + 607497889.

It is an arithmetic number, because the mean of its divisors is an integer number (607497889).

Almost surely, 2^1214995777 is an apocalyptic number.

It is an amenable number.

1214995777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214995777 is an equidigital number, since it uses as much as digits as its factorization.

1214995777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 52.

The square root of 1214995777 is about 34856.7895394857. The cubic root of 1214995777 is about 1067.0667550690.

The spelling of 1214995777 in words is "one billion, two hundred fourteen million, nine hundred ninety-five thousand, seven hundred seventy-seven".