78954487 has 2 divisors, whose sum is σ = 78954488. Its totient is φ = 78954486.

The previous prime is 78954461. The next prime is 78954509. The reversal of 78954487 is 78445987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78954487 - 2¹¹ = 78952439 is a prime.

It is a super-2 number, since 2×78954487² = 12467622034866338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78954437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39477243 + 39477244.

It is an arithmetic number, because the mean of its divisors is an integer number (39477244).

Almost surely, 2^78954487 is an apocalyptic number.

78954487 is a deficient number, since it is larger than the sum of its proper divisors (1).

78954487 is an equidigital number, since it uses as much as digits as its factorization.

78954487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The square root of 78954487 is about 8885.6337421706. The cubic root of 78954487 is about 429.0016264430.

The spelling of 78954487 in words is "seventy-eight million, nine hundred fifty-four thousand, four hundred eighty-seven".