64187001 has 6 divisors (see below), whose sum is σ = 92714570. Its totient is φ = 42791328.

The previous prime is 64186981. The next prime is 64187023. The reversal of 64187001 is 10078146.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59675625 + 4511376 = 7725^2 + 2124^2 .

It is not a de Polignac number, because 64187001 - 2⁷ = 64186873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64187041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3565936 + ... + 3565953.

Almost surely, 2^64187001 is an apocalyptic number.

It is an amenable number.

64187001 is a deficient number, since it is larger than the sum of its proper divisors (28527569).

64187001 is a wasteful number, since it uses less digits than its factorization.

64187001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131895 (or 7131892 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 64187001 is about 8011.6790375052. The cubic root of 64187001 is about 400.3892065894.

The spelling of 64187001 in words is "sixty-four million, one hundred eighty-seven thousand, one".