68407501 has 4 divisors (see below), whose sum is σ = 68427612. Its totient is φ = 68387392.

The previous prime is 68407481. The next prime is 68407511. The reversal of 68407501 is 10570486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10570486 = 2 ⋅5285243.

It can be written as a sum of positive squares in 2 ways, for example, as 15132100 + 53275401 = 3890^2 + 7299^2 .

It is a cyclic number.

It is not a de Polignac number, because 68407501 - 2¹⁹ = 67883213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68407511) 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, 3550 + ... + 12223.

It is an arithmetic number, because the mean of its divisors is an integer number (17106903).

Almost surely, 2^68407501 is an apocalyptic number.

It is an amenable number.

68407501 is a deficient number, since it is larger than the sum of its proper divisors (20111).

68407501 is a wasteful number, since it uses less digits than its factorization.

68407501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110.

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

The square root of 68407501 is about 8270.8827219348. The cubic root of 68407501 is about 408.9792195371.

Adding to 68407501 its reverse (10570486), we get a palindrome (78977987).

It can be divided in two parts, 6840 and 7501, that added together give a palindrome (14341).

The spelling of 68407501 in words is "sixty-eight million, four hundred seven thousand, five hundred one".