238101491 has 2 divisors, whose sum is σ = 238101492. Its totient is φ = 238101490.

The previous prime is 238101467. The next prime is 238101499. The reversal of 238101491 is 194101832.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238101491 is a prime.

It is not a weakly prime, because it can be changed into another prime (238101499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119050745 + 119050746.

It is an arithmetic number, because the mean of its divisors is an integer number (119050746).

Almost surely, 2^238101491 is an apocalyptic number.

238101491 is a deficient number, since it is larger than the sum of its proper divisors (1).

238101491 is an equidigital number, since it uses as much as digits as its factorization.

238101491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 238101491 is about 15430.5376121508. The cubic root of 238101491 is about 619.8035199474.

The spelling of 238101491 in words is "two hundred thirty-eight million, one hundred one thousand, four hundred ninety-one".