78913001 has 2 divisors, whose sum is σ = 78913002. Its totient is φ = 78913000.

The previous prime is 78912991. The next prime is 78913049. The reversal of 78913001 is 10031987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78234025 + 678976 = 8845^2 + 824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78913001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78913301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39456500 + 39456501.

It is an arithmetic number, because the mean of its divisors is an integer number (39456501).

Almost surely, 2^78913001 is an apocalyptic number.

It is an amenable number.

78913001 is a deficient number, since it is larger than the sum of its proper divisors (1).

78913001 is an equidigital number, since it uses as much as digits as its factorization.

78913001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 78913001 is about 8883.2989930543. The cubic root of 78913001 is about 428.9264747944.

Adding to 78913001 its reverse (10031987), we get a palindrome (88944988).

The spelling of 78913001 in words is "seventy-eight million, nine hundred thirteen thousand, one".