369787681 has 4 divisors (see below), whose sum is σ = 377655552. Its totient is φ = 361919812.

The previous prime is 369787669. The next prime is 369787697. The reversal of 369787681 is 186787963.

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 an emirpimes, since its reverse is a distinct semiprime: 186787963 = 3229 ⋅57847.

It is a cyclic number.

It is not a de Polignac number, because 369787681 - 2²¹ = 367690529 is a prime.

It is a super-2 number, since 2×369787681² = 273485858038715522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (369787601) 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, 3933865 + ... + 3933958.

It is an arithmetic number, because the mean of its divisors is an integer number (94413888).

Almost surely, 2^369787681 is an apocalyptic number.

It is an amenable number.

369787681 is a deficient number, since it is larger than the sum of its proper divisors (7867871).

369787681 is an equidigital number, since it uses as much as digits as its factorization.

369787681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7867870.

The product of its digits is 3048192, while the sum is 55.

The square root of 369787681 is about 19229.8643000932. The cubic root of 369787681 is about 717.7680891447.

It can be divided in two parts, 3697 and 87681, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 369787681 in words is "three hundred sixty-nine million, seven hundred eighty-seven thousand, six hundred eighty-one".