78654001 has 4 divisors (see below), whose sum is σ = 78682212. Its totient is φ = 78625792.

The previous prime is 78653999. The next prime is 78654049. The reversal of 78654001 is 10045687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63043600 + 15610401 = 7940^2 + 3951^2 .

It is a cyclic number.

It is not a de Polignac number, because 78654001 - 2¹ = 78653999 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78654101) 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, 9400 + ... + 15673.

It is an arithmetic number, because the mean of its divisors is an integer number (19670553).

Almost surely, 2^78654001 is an apocalyptic number.

It is an amenable number.

78654001 is a deficient number, since it is larger than the sum of its proper divisors (28211).

78654001 is a wasteful number, since it uses less digits than its factorization.

78654001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28210.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 78654001 is about 8868.7090943384. The cubic root of 78654001 is about 428.4567012641.

Adding to 78654001 its reverse (10045687), we get a palindrome (88699688).

The spelling of 78654001 in words is "seventy-eight million, six hundred fifty-four thousand, one".