68263621 has 4 divisors (see below), whose sum is σ = 68383744. Its totient is φ = 68143500.

The previous prime is 68263571. The next prime is 68263633. The reversal of 68263621 is 12636286.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68263621 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 (68263691) 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, 59205 + ... + 60346.

It is an arithmetic number, because the mean of its divisors is an integer number (17095936).

Almost surely, 2^68263621 is an apocalyptic number.

It is an amenable number.

68263621 is a deficient number, since it is larger than the sum of its proper divisors (120123).

68263621 is a wasteful number, since it uses less digits than its factorization.

68263621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120122.

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

The square root of 68263621 is about 8262.1801602241. The cubic root of 68263621 is about 408.6922859281.

The spelling of 68263621 in words is "sixty-eight million, two hundred sixty-three thousand, six hundred twenty-one".