78460999 has 2 divisors, whose sum is σ = 78461000. Its totient is φ = 78460998.

The previous prime is 78460951. The next prime is 78461011. The reversal of 78460999 is 99906487.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78460999 is a prime.

It is a super-2 number, since 2×78460999² = 12312256728156002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78460919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39230499 + 39230500.

It is an arithmetic number, because the mean of its divisors is an integer number (39230500).

Almost surely, 2^78460999 is an apocalyptic number.

78460999 is a deficient number, since it is larger than the sum of its proper divisors (1).

78460999 is an equidigital number, since it uses as much as digits as its factorization.

78460999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 78460999 is about 8857.8213461325. The cubic root of 78460999 is about 428.1059637335.

The spelling of 78460999 in words is "seventy-eight million, four hundred sixty thousand, nine hundred ninety-nine".