787878667 has 2 divisors, whose sum is σ = 787878668. Its totient is φ = 787878666.

The previous prime is 787878647. The next prime is 787878683. The reversal of 787878667 is 766878787.

It is a strong prime.

It is an emirp because it is prime and its reverse (766878787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 787878667 - 2¹⁵ = 787845899 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 787878599 and 787878608.

It is not a weakly prime, because it can be changed into another prime (787878607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393939333 + 393939334.

It is an arithmetic number, because the mean of its divisors is an integer number (393939334).

Almost surely, 2^787878667 is an apocalyptic number.

787878667 is a deficient number, since it is larger than the sum of its proper divisors (1).

787878667 is an equidigital number, since it uses as much as digits as its factorization.

787878667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44255232, while the sum is 64.

The square root of 787878667 is about 28069.1764574595. The cubic root of 787878667 is about 923.6053654042.

The spelling of 787878667 in words is "seven hundred eighty-seven million, eight hundred seventy-eight thousand, six hundred sixty-seven".