72465109 has 2 divisors, whose sum is σ = 72465110. Its totient is φ = 72465108.

The previous prime is 72465091. The next prime is 72465137. The reversal of 72465109 is 90156427.

Together with previous prime (72465091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68013009 + 4452100 = 8247^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 72465109 - 2¹⁵ = 72432341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72465149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36232554 + 36232555.

It is an arithmetic number, because the mean of its divisors is an integer number (36232555).

Almost surely, 2^72465109 is an apocalyptic number.

It is an amenable number.

72465109 is a deficient number, since it is larger than the sum of its proper divisors (1).

72465109 is an equidigital number, since it uses as much as digits as its factorization.

72465109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 72465109 is about 8512.6440663286. The cubic root of 72465109 is about 416.9106441698.

The spelling of 72465109 in words is "seventy-two million, four hundred sixty-five thousand, one hundred nine".