387826249 has 2 divisors, whose sum is σ = 387826250. Its totient is φ = 387826248.

The previous prime is 387826237. The next prime is 387826259. The reversal of 387826249 is 942628783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373726224 + 14100025 = 19332^2 + 3755^2 .

It is an emirp because it is prime and its reverse (942628783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 387826249 - 2⁷ = 387826121 is a prime.

It is not a weakly prime, because it can be changed into another prime (387826259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193913124 + 193913125.

It is an arithmetic number, because the mean of its divisors is an integer number (193913125).

Almost surely, 2^387826249 is an apocalyptic number.

It is an amenable number.

387826249 is a deficient number, since it is larger than the sum of its proper divisors (1).

387826249 is an equidigital number, since it uses as much as digits as its factorization.

387826249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 387826249 is about 19693.3046744319. The cubic root of 387826249 is about 729.2544142100.

It can be divided in two parts, 38 and 7826249, that added together give a palindrome (7826287).

The spelling of 387826249 in words is "three hundred eighty-seven million, eight hundred twenty-six thousand, two hundred forty-nine".