238749949 has 2 divisors, whose sum is σ = 238749950. Its totient is φ = 238749948.

The previous prime is 238749919. The next prime is 238749997. The reversal of 238749949 is 949947832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232349049 + 6400900 = 15243^2 + 2530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238749949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238749949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238749919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119374974 + 119374975.

It is an arithmetic number, because the mean of its divisors is an integer number (119374975).

Almost surely, 2^238749949 is an apocalyptic number.

It is an amenable number.

238749949 is a deficient number, since it is larger than the sum of its proper divisors (1).

238749949 is an equidigital number, since it uses as much as digits as its factorization.

238749949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The square root of 238749949 is about 15451.5354900411. The cubic root of 238749949 is about 620.3656783132.

The spelling of 238749949 in words is "two hundred thirty-eight million, seven hundred forty-nine thousand, nine hundred forty-nine".