383603497261 has 4 divisors (see below), whose sum is σ = 384489418012. Its totient is φ = 382717576512.

The previous prime is 383603497243. The next prime is 383603497267. The reversal of 383603497261 is 162794306383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162794306383 = 23 ⋅7078013321.

It can be written as a sum of positive squares in 2 ways, for example, as 70686325161 + 312917172100 = 265869^2 + 559390^2 .

It is a cyclic number.

It is not a de Polignac number, because 383603497261 - 2¹⁷ = 383603366189 is a prime.

It is a super-2 number, since 2×383603497261² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 383603497199 and 383603497208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383603497267) 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, 442959726 + ... + 442960591.

It is an arithmetic number, because the mean of its divisors is an integer number (96122354503).

Almost surely, 2^383603497261 is an apocalyptic number.

It is an amenable number.

383603497261 is a deficient number, since it is larger than the sum of its proper divisors (885920751).

383603497261 is an equidigital number, since it uses as much as digits as its factorization.

383603497261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885920750.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 383603497261 in words is "three hundred eighty-three billion, six hundred three million, four hundred ninety-seven thousand, two hundred sixty-one".