223770649 has 2 divisors, whose sum is σ = 223770650. Its totient is φ = 223770648.

The previous prime is 223770587. The next prime is 223770689. The reversal of 223770649 is 946077322.

223770649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (223770689) can be obtained adding 223770649 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218448400 + 5322249 = 14780^2 + 2307^2 .

It is a cyclic number.

It is not a de Polignac number, because 223770649 - 2²¹ = 221673497 is a prime.

It is equal to p_12318979 and since 223770649 and 12318979 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (223770689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111885324 + 111885325.

It is an arithmetic number, because the mean of its divisors is an integer number (111885325).

Almost surely, 2^223770649 is an apocalyptic number.

It is an amenable number.

223770649 is a deficient number, since it is larger than the sum of its proper divisors (1).

223770649 is an equidigital number, since it uses as much as digits as its factorization.

223770649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 223770649 is about 14958.9655056759. The cubic root of 223770649 is about 607.1104483792.

The spelling of 223770649 in words is "two hundred twenty-three million, seven hundred seventy thousand, six hundred forty-nine".