68479421 has 4 divisors (see below), whose sum is σ = 68838144. Its totient is φ = 68120700.

The previous prime is 68479391. The next prime is 68479483. The reversal of 68479421 is 12497486.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12497486 = 2 ⋅6248743.

It is a cyclic number.

It is not a de Polignac number, because 68479421 - 2¹⁴ = 68463037 is a prime.

It is a super-2 number, since 2×68479421² = 9378862200990482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68472421) 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, 179075 + ... + 179456.

It is an arithmetic number, because the mean of its divisors is an integer number (17209536).

Almost surely, 2^68479421 is an apocalyptic number.

It is an amenable number.

68479421 is a deficient number, since it is larger than the sum of its proper divisors (358723).

68479421 is a wasteful number, since it uses less digits than its factorization.

68479421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358722.

The product of its digits is 96768, while the sum is 41.

The square root of 68479421 is about 8275.2293623802. The cubic root of 68479421 is about 409.1224956546.

The spelling of 68479421 in words is "sixty-eight million, four hundred seventy-nine thousand, four hundred twenty-one".