238919977 has 2 divisors, whose sum is σ = 238919978. Its totient is φ = 238919976.

The previous prime is 238919971. The next prime is 238920013. The reversal of 238919977 is 779919832.

238919977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238887936 + 32041 = 15456^2 + 179^2 .

It is a cyclic number.

It is not a de Polignac number, because 238919977 - 2¹¹ = 238917929 is a prime.

It is not a weakly prime, because it can be changed into another prime (238919971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119459988 + 119459989.

It is an arithmetic number, because the mean of its divisors is an integer number (119459989).

Almost surely, 2^238919977 is an apocalyptic number.

It is an amenable number.

238919977 is a deficient number, since it is larger than the sum of its proper divisors (1).

238919977 is an equidigital number, since it uses as much as digits as its factorization.

238919977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 238919977 is about 15457.0364882794. The cubic root of 238919977 is about 620.5129097667.

It can be divided in two parts, 2389 and 19977, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 238919977 in words is "two hundred thirty-eight million, nine hundred nineteen thousand, nine hundred seventy-seven".