427749437 has 4 divisors (see below), whose sum is σ = 427820316. Its totient is φ = 427678560.

The previous prime is 427749419. The next prime is 427749473. The reversal of 427749437 is 734947724.

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

It can be written as a sum of positive squares in 2 ways, for example, as 277588921 + 150160516 = 16661^2 + 12254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427749437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 427749391 and 427749400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427749037) 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, 25448 + ... + 38769.

It is an arithmetic number, because the mean of its divisors is an integer number (106955079).

Almost surely, 2^427749437 is an apocalyptic number.

It is an amenable number.

427749437 is a deficient number, since it is larger than the sum of its proper divisors (70879).

427749437 is an equidigital number, since it uses as much as digits as its factorization.

427749437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70878.

The product of its digits is 1185408, while the sum is 47.

The square root of 427749437 is about 20682.1042691502. The cubic root of 427749437 is about 753.4651138447.

The spelling of 427749437 in words is "four hundred twenty-seven million, seven hundred forty-nine thousand, four hundred thirty-seven".