1213987967 has 2 divisors, whose sum is σ = 1213987968. Its totient is φ = 1213987966.

The previous prime is 1213987939. The next prime is 1213987979. The reversal of 1213987967 is 7697893121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213987967 - 2⁶ = 1213987903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213987927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606993983 + 606993984.

It is an arithmetic number, because the mean of its divisors is an integer number (606993984).

Almost surely, 2^1213987967 is an apocalyptic number.

1213987967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213987967 is an equidigital number, since it uses as much as digits as its factorization.

1213987967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 53.

The square root of 1213987967 is about 34842.3301029079. The cubic root of 1213987967 is about 1066.7716379875.

The spelling of 1213987967 in words is "one billion, two hundred thirteen million, nine hundred eighty-seven thousand, nine hundred sixty-seven".