64140973 has 8 divisors (see below), whose sum is σ = 69238400. Its totient is φ = 59066928.

The previous prime is 64140931. The next prime is 64141003. The reversal of 64140973 is 37904146.

It is a happy number.

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 64140973 - 2¹⁷ = 64009901 is a prime.

It is a super-2 number, since 2×64140973² = 8228128834773458, 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 (64140913) 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, 88 + ... + 11326.

It is an arithmetic number, because the mean of its divisors is an integer number (8654800).

Almost surely, 2^64140973 is an apocalyptic number.

It is an amenable number.

64140973 is a deficient number, since it is larger than the sum of its proper divisors (5097427).

64140973 is a wasteful number, since it uses less digits than its factorization.

64140973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11691.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 64140973 is about 8008.8059659352. The cubic root of 64140973 is about 400.2934783735.

It can be divided in two parts, 641 and 40973, that added together give a palindrome (41614).

The spelling of 64140973 in words is "sixty-four million, one hundred forty thousand, nine hundred seventy-three".