78403627 has 2 divisors, whose sum is σ = 78403628. Its totient is φ = 78403626.

The previous prime is 78403607. The next prime is 78403673. The reversal of 78403627 is 72630487.

It is a weak prime.

It is an emirp because it is prime and its reverse (72630487) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78403627 is a prime.

It is a super-2 number, since 2×78403627² = 12294257453510258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78403607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39201813 + 39201814.

It is an arithmetic number, because the mean of its divisors is an integer number (39201814).

Almost surely, 2^78403627 is an apocalyptic number.

78403627 is a deficient number, since it is larger than the sum of its proper divisors (1).

78403627 is an equidigital number, since it uses as much as digits as its factorization.

78403627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 78403627 is about 8854.5822600504. The cubic root of 78403627 is about 428.0015922001.

The spelling of 78403627 in words is "seventy-eight million, four hundred three thousand, six hundred twenty-seven".