381253797 has 20 divisors (see below), whose sum is σ = 570219276. Its totient is φ = 253860480.

The previous prime is 381253759. The next prime is 381253799. The reversal of 381253797 is 797352183.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 272448036 + 108805761 = 16506^2 + 10431^2 .

It is not a de Polignac number, because 381253797 - 2²³ = 372865189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381253799) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78397 + ... + 83117.

Almost surely, 2^381253797 is an apocalyptic number.

It is an amenable number.

381253797 is a deficient number, since it is larger than the sum of its proper divisors (188965479).

381253797 is an equidigital number, since it uses as much as digits as its factorization.

381253797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730 (or 5721 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 381253797 is about 19525.7214207312. The cubic root of 381253797 is about 725.1113880382. Note that the first 3 decimals are identical.

The spelling of 381253797 in words is "three hundred eighty-one million, two hundred fifty-three thousand, seven hundred ninety-seven".