223731947 has 2 divisors, whose sum is σ = 223731948. Its totient is φ = 223731946.

The previous prime is 223731931. The next prime is 223731997. The reversal of 223731947 is 749137322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 223731947 - 2⁴ = 223731931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223731947.

It is not a weakly prime, because it can be changed into another prime (223731997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111865973 + 111865974.

It is an arithmetic number, because the mean of its divisors is an integer number (111865974).

Almost surely, 2^223731947 is an apocalyptic number.

223731947 is a deficient number, since it is larger than the sum of its proper divisors (1).

223731947 is an equidigital number, since it uses as much as digits as its factorization.

223731947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 223731947 is about 14957.6718442410. The cubic root of 223731947 is about 607.0754456604.

The spelling of 223731947 in words is "two hundred twenty-three million, seven hundred thirty-one thousand, nine hundred forty-seven".