164040709 has 16 divisors (see below), whose sum is σ = 193299840. Its totient is φ = 136304640.

The previous prime is 164040707. The next prime is 164040781. The reversal of 164040709 is 907040461.

It is a cyclic number.

It is not a de Polignac number, because 164040709 - 2¹ = 164040707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164040707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27429 + ... + 32869.

It is an arithmetic number, because the mean of its divisors is an integer number (12081240).

Almost surely, 2^164040709 is an apocalyptic number.

It is an amenable number.

164040709 is a deficient number, since it is larger than the sum of its proper divisors (29259131).

164040709 is an equidigital number, since it uses as much as digits as its factorization.

164040709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 164040709 is about 12807.8377956625. The cubic root of 164040709 is about 547.4156541807.

The spelling of 164040709 in words is "one hundred sixty-four million, forty thousand, seven hundred nine".