1215717967 has 2 divisors, whose sum is σ = 1215717968. Its totient is φ = 1215717966.

The previous prime is 1215717949. The next prime is 1215717977. The reversal of 1215717967 is 7697175121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215717967 is a prime.

It is a super-2 number, since 2×1215717967² = 2955940350573226178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215717947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607858983 + 607858984.

It is an arithmetic number, because the mean of its divisors is an integer number (607858984).

Almost surely, 2^1215717967 is an apocalyptic number.

1215717967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215717967 is an equidigital number, since it uses as much as digits as its factorization.

1215717967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 46.

The square root of 1215717967 is about 34867.1473883368. The cubic root of 1215717967 is about 1067.2781336650.

The spelling of 1215717967 in words is "one billion, two hundred fifteen million, seven hundred seventeen thousand, nine hundred sixty-seven".