64492909 has 8 divisors (see below), whose sum is σ = 70291872. Its totient is φ = 58813680.

The previous prime is 64492907. The next prime is 64492913. The reversal of 64492909 is 90929446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64492909 - 2¹ = 64492907 is a prime.

It is a super-2 number, since 2×64492909² = 8318670622564562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64492903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28807 + ... + 30964.

It is an arithmetic number, because the mean of its divisors is an integer number (8786484).

Almost surely, 2^64492909 is an apocalyptic number.

It is an amenable number.

64492909 is a deficient number, since it is larger than the sum of its proper divisors (5798963).

64492909 is a wasteful number, since it uses less digits than its factorization.

64492909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59867.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 64492909 is about 8030.7477235934. The cubic root of 64492909 is about 401.0242686954.

The spelling of 64492909 in words is "sixty-four million, four hundred ninety-two thousand, nine hundred nine".