68477513 has 8 divisors (see below), whose sum is σ = 78083208. Its totient is φ = 59491584.

The previous prime is 68477483. The next prime is 68477527. The reversal of 68477513 is 31577486.

It can be written as a sum of positive squares in 4 ways, for example, as 51529 + 68425984 = 227^2 + 8272^2 .

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 68477513 - 2¹² = 68473417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68477413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154706 + ... + 155147.

It is an arithmetic number, because the mean of its divisors is an integer number (9760401).

Almost surely, 2^68477513 is an apocalyptic number.

It is an amenable number.

68477513 is a deficient number, since it is larger than the sum of its proper divisors (9605695).

68477513 is a wasteful number, since it uses less digits than its factorization.

68477513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309883.

The product of its digits is 141120, while the sum is 41.

The square root of 68477513 is about 8275.1140777635. The cubic root of 68477513 is about 409.1186959098.

The spelling of 68477513 in words is "sixty-eight million, four hundred seventy-seven thousand, five hundred thirteen".