78462481 has 2 divisors, whose sum is σ = 78462482. Its totient is φ = 78462480.

The previous prime is 78462443. The next prime is 78462491. The reversal of 78462481 is 18426487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76720081 + 1742400 = 8759^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 78462481 - 2⁹ = 78461969 is a prime.

It is a super-2 number, since 2×78462481² = 12312721849350722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78462421) 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, 39231240 + 39231241.

It is an arithmetic number, because the mean of its divisors is an integer number (39231241).

Almost surely, 2^78462481 is an apocalyptic number.

It is an amenable number.

78462481 is a deficient number, since it is larger than the sum of its proper divisors (1).

78462481 is an equidigital number, since it uses as much as digits as its factorization.

78462481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 40.

The square root of 78462481 is about 8857.9050006195. The cubic root of 78462481 is about 428.1086591238.

The spelling of 78462481 in words is "seventy-eight million, four hundred sixty-two thousand, four hundred eighty-one".