78772403 has 2 divisors, whose sum is σ = 78772404. Its totient is φ = 78772402.

The previous prime is 78772399. The next prime is 78772417. The reversal of 78772403 is 30427787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78772403 - 2² = 78772399 is a prime.

It is not a weakly prime, because it can be changed into another prime (78772433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39386201 + 39386202.

It is an arithmetic number, because the mean of its divisors is an integer number (39386202).

Almost surely, 2^78772403 is an apocalyptic number.

78772403 is a deficient number, since it is larger than the sum of its proper divisors (1).

78772403 is an equidigital number, since it uses as much as digits as its factorization.

78772403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 78772403 is about 8875.3818509403. The cubic root of 78772403 is about 428.6715862684.

The spelling of 78772403 in words is "seventy-eight million, seven hundred seventy-two thousand, four hundred three".