1031665601 has 4 divisors (see below), whose sum is σ = 1031735232. Its totient is φ = 1031595972.

The previous prime is 1031665597. The next prime is 1031665627. The reversal of 1031665601 is 1065661301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1031665601 - 2² = 1031665597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031665501) 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, 2741 + ... + 45506.

It is an arithmetic number, because the mean of its divisors is an integer number (257933808).

Almost surely, 2^1031665601 is an apocalyptic number.

It is an amenable number.

1031665601 is a deficient number, since it is larger than the sum of its proper divisors (69631).

1031665601 is an equidigital number, since it uses as much as digits as its factorization.

1031665601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69630.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1031665601 is about 32119.5516936336. The cubic root of 1031665601 is about 1010.4457076058.

The spelling of 1031665601 in words is "one billion, thirty-one million, six hundred sixty-five thousand, six hundred one".