77520001 has 8 divisors (see below), whose sum is σ = 84659904. Its totient is φ = 70548240.

The previous prime is 77519999. The next prime is 77520007. The reversal of 77520001 is 10002577.

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 77520001 - 2¹ = 77519999 is a prime.

It is a super-4 number, since 4×77520001⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77520007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41071 + ... + 42916.

It is an arithmetic number, because the mean of its divisors is an integer number (10582488).

Almost surely, 2^77520001 is an apocalyptic number.

77520001 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

77520001 is a deficient number, since it is larger than the sum of its proper divisors (7139903).

77520001 is a wasteful number, since it uses less digits than its factorization.

77520001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84071.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 77520001 is about 8804.5443380109. The cubic root of 77520001 is about 426.3876231936.

Adding to 77520001 its reverse (10002577), we get a palindrome (87522578).

The spelling of 77520001 in words is "seventy-seven million, five hundred twenty thousand, one".