64236989 has 8 divisors (see below), whose sum is σ = 65065728. Its totient is φ = 63411840.

The previous prime is 64236983. The next prime is 64237003. The reversal of 64236989 is 98963246.

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 64236989 - 2¹² = 64232893 is a prime.

It is a super-2 number, since 2×64236989² = 8252781511572242, 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 (64236983) 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, 58334 + ... + 59424.

It is an arithmetic number, because the mean of its divisors is an integer number (8133216).

Almost surely, 2^64236989 is an apocalyptic number.

It is an amenable number.

64236989 is a deficient number, since it is larger than the sum of its proper divisors (828739).

64236989 is a wasteful number, since it uses less digits than its factorization.

64236989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795.

The product of its digits is 559872, while the sum is 47.

The square root of 64236989 is about 8014.7981259667. The cubic root of 64236989 is about 400.4931189179.

The spelling of 64236989 in words is "sixty-four million, two hundred thirty-six thousand, nine hundred eighty-nine".