3690987 has 4 divisors (see below), whose sum is σ = 4921320. Its totient is φ = 2460656.

The previous prime is 3690983. The next prime is 3691003. The reversal of 3690987 is 7890963.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7890963 = 3 ⋅2630321.

It is a cyclic number.

It is not a de Polignac number, because 3690987 - 2² = 3690983 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (3690983) 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, 615162 + ... + 615167.

It is an arithmetic number, because the mean of its divisors is an integer number (1230330).

Almost surely, 2^3690987 is an apocalyptic number.

3690987 is a deficient number, since it is larger than the sum of its proper divisors (1230333).

3690987 is a wasteful number, since it uses less digits than its factorization.

3690987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230332.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3690987 is about 1921.1941598912. The cubic root of 3690987 is about 154.5423476045.

The spelling of 3690987 in words is "three million, six hundred ninety thousand, nine hundred eighty-seven".