227640709 has 4 divisors (see below), whose sum is σ = 227899980. Its totient is φ = 227381440.

The previous prime is 227640701. The next prime is 227640731. The reversal of 227640709 is 907046722.

It is a happy number.

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 136819809 + 90820900 = 11697^2 + 9530^2 .

It is a cyclic number.

It is not a de Polignac number, because 227640709 - 2³ = 227640701 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 (227640701) 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, 128314 + ... + 130075.

It is an arithmetic number, because the mean of its divisors is an integer number (56974995).

Almost surely, 2^227640709 is an apocalyptic number.

It is an amenable number.

227640709 is a deficient number, since it is larger than the sum of its proper divisors (259271).

227640709 is an equidigital number, since it uses as much as digits as its factorization.

227640709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259270.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 227640709 is about 15087.7668659083. The cubic root of 227640709 is about 610.5904066047.

The spelling of 227640709 in words is "two hundred twenty-seven million, six hundred forty thousand, seven hundred nine".