72526109 has 2 divisors, whose sum is σ = 72526110. Its totient is φ = 72526108.

The previous prime is 72526099. The next prime is 72526151. The reversal of 72526109 is 90162527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55920484 + 16605625 = 7478^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 72526109 - 2⁸ = 72525853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72526009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36263054 + 36263055.

It is an arithmetic number, because the mean of its divisors is an integer number (36263055).

Almost surely, 2^72526109 is an apocalyptic number.

It is an amenable number.

72526109 is a deficient number, since it is larger than the sum of its proper divisors (1).

72526109 is an equidigital number, since it uses as much as digits as its factorization.

72526109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 72526109 is about 8516.2262182260. The cubic root of 72526109 is about 417.0275943224.

The spelling of 72526109 in words is "seventy-two million, five hundred twenty-six thousand, one hundred nine".