228990701 has 2 divisors, whose sum is σ = 228990702. Its totient is φ = 228990700.

The previous prime is 228990689. The next prime is 228990703. The reversal of 228990701 is 107099822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186349801 + 42640900 = 13651^2 + 6530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228990701 is a prime.

It is a super-2 number, since 2×228990701² = 104873482288942802, which contains 22 as substring.

Together with 228990703, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 228990701 parts by 21400 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228990703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114495350 + 114495351.

It is an arithmetic number, because the mean of its divisors is an integer number (114495351).

Almost surely, 2^228990701 is an apocalyptic number.

It is an amenable number.

228990701 is a deficient number, since it is larger than the sum of its proper divisors (1).

228990701 is an equidigital number, since it uses as much as digits as its factorization.

228990701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 228990701 is about 15132.4386996941. The cubic root of 228990701 is about 611.7950359885.

The spelling of 228990701 in words is "two hundred twenty-eight million, nine hundred ninety thousand, seven hundred one".