421681713 has 4 divisors (see below), whose sum is σ = 562242288. Its totient is φ = 281121140.

The previous prime is 421681699. The next prime is 421681717. The reversal of 421681713 is 317186124.

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 not a de Polignac number, because 421681713 - 2⁵ = 421681681 is a prime.

It is a super-2 number, since 2×421681713² = 355630934157228738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421681717) 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, 70280283 + ... + 70280288.

It is an arithmetic number, because the mean of its divisors is an integer number (140560572).

Almost surely, 2^421681713 is an apocalyptic number.

It is an amenable number.

421681713 is a deficient number, since it is larger than the sum of its proper divisors (140560575).

421681713 is a wasteful number, since it uses less digits than its factorization.

421681713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140560574.

The product of its digits is 8064, while the sum is 33.

The square root of 421681713 is about 20534.8901384936. The cubic root of 421681713 is about 749.8854420584.

The spelling of 421681713 in words is "four hundred twenty-one million, six hundred eighty-one thousand, seven hundred thirteen".