238693649 has 2 divisors, whose sum is σ = 238693650. Its totient is φ = 238693648.

The previous prime is 238693621. The next prime is 238693669. The reversal of 238693649 is 946396832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202777600 + 35916049 = 14240^2 + 5993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238693649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238693597 and 238693606.

It is not a weakly prime, because it can be changed into another prime (238693619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119346824 + 119346825.

It is an arithmetic number, because the mean of its divisors is an integer number (119346825).

Almost surely, 2^238693649 is an apocalyptic number.

It is an amenable number.

238693649 is a deficient number, since it is larger than the sum of its proper divisors (1).

238693649 is an equidigital number, since it uses as much as digits as its factorization.

238693649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 50.

The square root of 238693649 is about 15449.7135572152. The cubic root of 238693649 is about 620.3169113451.

The spelling of 238693649 in words is "two hundred thirty-eight million, six hundred ninety-three thousand, six hundred forty-nine".