307681421 has 8 divisors (see below), whose sum is σ = 324175200. Its totient is φ = 291217680.

The previous prime is 307681399. The next prime is 307681427. The reversal of 307681421 is 124186703.

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 307681421 - 2¹⁴ = 307665037 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 (307681427) 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, 15335 + ... + 29163.

It is an arithmetic number, because the mean of its divisors is an integer number (40521900).

Almost surely, 2^307681421 is an apocalyptic number.

It is an amenable number.

307681421 is a deficient number, since it is larger than the sum of its proper divisors (16493779).

307681421 is a wasteful number, since it uses less digits than its factorization.

307681421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15019.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 307681421 is about 17540.8500649199. The cubic root of 307681421 is about 675.0984189369.

The spelling of 307681421 in words is "three hundred seven million, six hundred eighty-one thousand, four hundred twenty-one".