781972967 has 2 divisors, whose sum is σ = 781972968. Its totient is φ = 781972966.

The previous prime is 781972943. The next prime is 781972993. The reversal of 781972967 is 769279187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 781972967 - 2¹² = 781968871 is a prime.

It is a super-2 number, since 2×781972967² = 1222963442237566178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781972927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390986483 + 390986484.

It is an arithmetic number, because the mean of its divisors is an integer number (390986484).

Almost surely, 2^781972967 is an apocalyptic number.

781972967 is a deficient number, since it is larger than the sum of its proper divisors (1).

781972967 is an equidigital number, since it uses as much as digits as its factorization.

781972967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 56.

The square root of 781972967 is about 27963.7795549886. The cubic root of 781972967 is about 921.2918866115.

The spelling of 781972967 in words is "seven hundred eighty-one million, nine hundred seventy-two thousand, nine hundred sixty-seven".