407689643 has 4 divisors (see below), whose sum is σ = 418708320. Its totient is φ = 396670968.

The previous prime is 407689613. The next prime is 407689663. The reversal of 407689643 is 346986704.

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 407689643 - 2¹² = 407685547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (407689603) 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, 5509283 + ... + 5509356.

It is an arithmetic number, because the mean of its divisors is an integer number (104677080).

Almost surely, 2^407689643 is an apocalyptic number.

407689643 is a deficient number, since it is larger than the sum of its proper divisors (11018677).

407689643 is a wasteful number, since it uses less digits than its factorization.

407689643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11018676.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 407689643 is about 20191.3259346681. The cubic root of 407689643 is about 741.4978445244.

The spelling of 407689643 in words is "four hundred seven million, six hundred eighty-nine thousand, six hundred forty-three".