365335981 has 4 divisors (see below), whose sum is σ = 365378364. Its totient is φ = 365293600.

The previous prime is 365335973. The next prime is 365335987. The reversal of 365335981 is 189533563.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 140635881 + 224700100 = 11859^2 + 14990^2 .

It is a cyclic number.

It is not a de Polignac number, because 365335981 - 2³ = 365335973 is a prime.

It is a super-2 number, since 2×365335981² = 266940758026464722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365335987) 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, 3130 + ... + 27211.

It is an arithmetic number, because the mean of its divisors is an integer number (91344591).

Almost surely, 2^365335981 is an apocalyptic number.

It is an amenable number.

365335981 is a deficient number, since it is larger than the sum of its proper divisors (42383).

365335981 is a wasteful number, since it uses less digits than its factorization.

365335981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42382.

The product of its digits is 291600, while the sum is 43.

The square root of 365335981 is about 19113.7641766346. The cubic root of 365335981 is about 714.8761622290.

The spelling of 365335981 in words is "three hundred sixty-five million, three hundred thirty-five thousand, nine hundred eighty-one".