79138001 has 2 divisors, whose sum is σ = 79138002. Its totient is φ = 79138000.

The previous prime is 79137991. The next prime is 79138019. The reversal of 79138001 is 10083197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78499600 + 638401 = 8860^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 79138001 - 2¹⁰ = 79136977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79138051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39569000 + 39569001.

It is an arithmetic number, because the mean of its divisors is an integer number (39569001).

Almost surely, 2^79138001 is an apocalyptic number.

It is an amenable number.

79138001 is a deficient number, since it is larger than the sum of its proper divisors (1).

79138001 is an equidigital number, since it uses as much as digits as its factorization.

79138001 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 79138001 is about 8895.9541927777. The cubic root of 79138001 is about 429.3337455764. Note that the first 3 decimals are identical.

The spelling of 79138001 in words is "seventy-nine million, one hundred thirty-eight thousand, one".