78242603 has 2 divisors, whose sum is σ = 78242604. Its totient is φ = 78242602.

The previous prime is 78242599. The next prime is 78242629. The reversal of 78242603 is 30624287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78242603 - 2² = 78242599 is a prime.

It is a super-2 number, since 2×78242603² = 12243809848431218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78242603.

It is not a weakly prime, because it can be changed into another prime (78242693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39121301 + 39121302.

It is an arithmetic number, because the mean of its divisors is an integer number (39121302).

Almost surely, 2^78242603 is an apocalyptic number.

78242603 is a deficient number, since it is larger than the sum of its proper divisors (1).

78242603 is an equidigital number, since it uses as much as digits as its factorization.

78242603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 78242603 is about 8845.4848934357. The cubic root of 78242603 is about 427.7083839811.

The spelling of 78242603 in words is "seventy-eight million, two hundred forty-two thousand, six hundred three".