78576403 has 2 divisors, whose sum is σ = 78576404. Its totient is φ = 78576402.

The previous prime is 78576401. The next prime is 78576439. The reversal of 78576403 is 30467587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78576403 - 2¹ = 78576401 is a prime.

It is a super-2 number, since 2×78576403² = 12348502216836818, which contains 22 as substring.

Together with 78576401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78576401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39288201 + 39288202.

It is an arithmetic number, because the mean of its divisors is an integer number (39288202).

Almost surely, 2^78576403 is an apocalyptic number.

78576403 is a deficient number, since it is larger than the sum of its proper divisors (1).

78576403 is an equidigital number, since it uses as much as digits as its factorization.

78576403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 78576403 is about 8864.3331954524. Note that the first 3 decimals coincide. The cubic root of 78576403 is about 428.3157534744.

The spelling of 78576403 in words is "seventy-eight million, five hundred seventy-six thousand, four hundred three".