387499253 has 2 divisors, whose sum is σ = 387499254. Its totient is φ = 387499252.

The previous prime is 387499219. The next prime is 387499283. The reversal of 387499253 is 352994783.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375506884 + 11992369 = 19378^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 387499253 - 2¹⁰ = 387498229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387499213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193749626 + 193749627.

It is an arithmetic number, because the mean of its divisors is an integer number (193749627).

Almost surely, 2^387499253 is an apocalyptic number.

It is an amenable number.

387499253 is a deficient number, since it is larger than the sum of its proper divisors (1).

387499253 is an equidigital number, since it uses as much as digits as its factorization.

387499253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 50.

The square root of 387499253 is about 19685.0007112014. Note that the first 3 decimals coincide. The cubic root of 387499253 is about 729.0493994397.

The spelling of 387499253 in words is "three hundred eighty-seven million, four hundred ninety-nine thousand, two hundred fifty-three".