78619001 has 2 divisors, whose sum is σ = 78619002. Its totient is φ = 78619000.

The previous prime is 78618989. The next prime is 78619049. The reversal of 78619001 is 10091687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 7974976 = 8405^2 + 2824^2 .

It is a cyclic number.

It is not a de Polignac number, because 78619001 - 2⁶ = 78618937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78619061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39309500 + 39309501.

It is an arithmetic number, because the mean of its divisors is an integer number (39309501).

Almost surely, 2^78619001 is an apocalyptic number.

It is an amenable number.

78619001 is a deficient number, since it is larger than the sum of its proper divisors (1).

78619001 is an equidigital number, since it uses as much as digits as its factorization.

78619001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 78619001 is about 8866.7356450951. The cubic root of 78619001 is about 428.3931392955.

The spelling of 78619001 in words is "seventy-eight million, six hundred nineteen thousand, one".