385631797 has 4 divisors (see below), whose sum is σ = 396054316. Its totient is φ = 375209280.

The previous prime is 385631789. The next prime is 385631801. The reversal of 385631797 is 797136583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 314920516 + 70711281 = 17746^2 + 8409^2 .

It is a cyclic number.

It is not a de Polignac number, because 385631797 - 2³ = 385631789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385631797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385631737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5211204 + ... + 5211277.

It is an arithmetic number, because the mean of its divisors is an integer number (99013579).

Almost surely, 2^385631797 is an apocalyptic number.

385631797 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

385631797 is a deficient number, since it is larger than the sum of its proper divisors (10422519).

385631797 is a wasteful number, since it uses less digits than its factorization.

385631797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10422518.

The product of its digits is 952560, while the sum is 49.

The square root of 385631797 is about 19637.5099490745. The cubic root of 385631797 is about 727.8763557725.

It can be divided in two parts, 3856 and 31797, that added together give a palindrome (35653).

The spelling of 385631797 in words is "three hundred eighty-five million, six hundred thirty-one thousand, seven hundred ninety-seven".