203079661 has 2 divisors, whose sum is σ = 203079662. Its totient is φ = 203079660.

The previous prime is 203079659. The next prime is 203079677. The reversal of 203079661 is 166970302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203062500 + 17161 = 14250^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 203079661 - 2¹ = 203079659 is a prime.

Together with 203079659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203079631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101539830 + 101539831.

It is an arithmetic number, because the mean of its divisors is an integer number (101539831).

Almost surely, 2^203079661 is an apocalyptic number.

It is an amenable number.

203079661 is a deficient number, since it is larger than the sum of its proper divisors (1).

203079661 is an equidigital number, since it uses as much as digits as its factorization.

203079661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 203079661 is about 14250.6021276296. The cubic root of 203079661 is about 587.7899324035.

The spelling of 203079661 in words is "two hundred three million, seventy-nine thousand, six hundred sixty-one".