83664401 has 4 divisors (see below), whose sum is σ = 83757552. Its totient is φ = 83571252.

The previous prime is 83664389. The next prime is 83664403. The reversal of 83664401 is 10446638.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83664401 - 2²⁶ = 16555537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83664403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45215 + ... + 47028.

It is an arithmetic number, because the mean of its divisors is an integer number (20939388).

Almost surely, 2^83664401 is an apocalyptic number.

It is an amenable number.

83664401 is a deficient number, since it is larger than the sum of its proper divisors (93151).

83664401 is an equidigital number, since it uses as much as digits as its factorization.

83664401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93150.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 83664401 is about 9146.8246402782. The cubic root of 83664401 is about 437.3678965507.

The spelling of 83664401 in words is "eighty-three million, six hundred sixty-four thousand, four hundred one".