427689739 has 4 divisors (see below), whose sum is σ = 437636056. Its totient is φ = 417743424.

The previous prime is 427689721. The next prime is 427689763. The reversal of 427689739 is 937986724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427689739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427689739.

It is not an unprimeable number, because it can be changed into a prime (427689719) 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, 4973094 + ... + 4973179.

It is an arithmetic number, because the mean of its divisors is an integer number (109409014).

Almost surely, 2^427689739 is an apocalyptic number.

427689739 is a deficient number, since it is larger than the sum of its proper divisors (9946317).

427689739 is an equidigital number, since it uses as much as digits as its factorization.

427689739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9946316.

The product of its digits is 4572288, while the sum is 55.

The square root of 427689739 is about 20680.6609904036. The cubic root of 427689739 is about 753.4300602602.

The spelling of 427689739 in words is "four hundred twenty-seven million, six hundred eighty-nine thousand, seven hundred thirty-nine".