78535201 has 4 divisors (see below), whose sum is σ = 80657812. Its totient is φ = 76412592.

The previous prime is 78535169. The next prime is 78535207. The reversal of 78535201 is 10253587.

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 67486225 + 11048976 = 8215^2 + 3324^2 .

It is a cyclic number.

It is not a de Polignac number, because 78535201 - 2⁵ = 78535169 is a prime.

It is a super-2 number, since 2×78535201² = 12335555592220802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78535207) 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, 1061250 + ... + 1061323.

It is an arithmetic number, because the mean of its divisors is an integer number (20164453).

Almost surely, 2^78535201 is an apocalyptic number.

It is an amenable number.

78535201 is a deficient number, since it is larger than the sum of its proper divisors (2122611).

78535201 is a wasteful number, since it uses less digits than its factorization.

78535201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122610.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 78535201 is about 8862.0088580412. The cubic root of 78535201 is about 428.2408770891.

Adding to 78535201 its reverse (10253587), we get a palindrome (88788788).

The spelling of 78535201 in words is "seventy-eight million, five hundred thirty-five thousand, two hundred one".