135472009 has 2 divisors, whose sum is σ = 135472010. Its totient is φ = 135472008.

The previous prime is 135471991. The next prime is 135472027. The reversal of 135472009 is 900274531.

It is a balanced prime because it is at equal distance from previous prime (135471991) and next prime (135472027).

It can be written as a sum of positive squares in only one way, i.e., 90782784 + 44689225 = 9528^2 + 6685^2 .

It is a cyclic number.

It is not a de Polignac number, because 135472009 - 2¹⁷ = 135340937 is a prime.

It is not a weakly prime, because it can be changed into another prime (135472709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67736004 + 67736005.

It is an arithmetic number, because the mean of its divisors is an integer number (67736005).

Almost surely, 2^135472009 is an apocalyptic number.

It is an amenable number.

135472009 is a deficient number, since it is larger than the sum of its proper divisors (1).

135472009 is an equidigital number, since it uses as much as digits as its factorization.

135472009 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 31.

The square root of 135472009 is about 11639.2443483243. The cubic root of 135472009 is about 513.5899582203.

The spelling of 135472009 in words is "one hundred thirty-five million, four hundred seventy-two thousand, nine".