3692981 has 4 divisors (see below), whose sum is σ = 3699072. Its totient is φ = 3686892.

The previous prime is 3692977. The next prime is 3693037. The reversal of 3692981 is 1892963.

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: 1892963 = 73 ⋅25931.

It is a cyclic number.

It is not a de Polignac number, because 3692981 - 2² = 3692977 is a prime.

It is a super-2 number, since 2×3692981² = 27276217332722, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3692951) 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, 2021 + ... + 3386.

It is an arithmetic number, because the mean of its divisors is an integer number (924768).

Almost surely, 2^3692981 is an apocalyptic number.

It is an amenable number.

3692981 is a deficient number, since it is larger than the sum of its proper divisors (6091).

3692981 is an equidigital number, since it uses as much as digits as its factorization.

3692981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090.

The product of its digits is 23328, while the sum is 38.

The square root of 3692981 is about 1921.7130378909. The cubic root of 3692981 is about 154.5701723178.

The spelling of 3692981 in words is "three million, six hundred ninety-two thousand, nine hundred eighty-one".