68621263 has 4 divisors (see below), whose sum is σ = 69000568. Its totient is φ = 68241960.

The previous prime is 68621257. The next prime is 68621297. The reversal of 68621263 is 36212686.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68621263 - 2⁹ = 68620751 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 (68621563) 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, 189381 + ... + 189742.

It is an arithmetic number, because the mean of its divisors is an integer number (17250142).

Almost surely, 2^68621263 is an apocalyptic number.

68621263 is a deficient number, since it is larger than the sum of its proper divisors (379305).

68621263 is a wasteful number, since it uses less digits than its factorization.

68621263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379304.

The product of its digits is 20736, while the sum is 34.

The square root of 68621263 is about 8283.7952050977. The cubic root of 68621263 is about 409.4047738033.

The spelling of 68621263 in words is "sixty-eight million, six hundred twenty-one thousand, two hundred sixty-three".