3967849653 has 4 divisors (see below), whose sum is σ = 5290466208. Its totient is φ = 2645233100.

The previous prime is 3967849643. The next prime is 3967849663. The reversal of 3967849653 is 3569487693.

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: 3569487693 = 3 ⋅1189829231.

It is an interprime number because it is at equal distance from previous prime (3967849643) and next prime (3967849663).

It is a cyclic number.

It is not a de Polignac number, because 3967849653 - 2⁴ = 3967849637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967849603) 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, 661308273 + ... + 661308278.

It is an arithmetic number, because the mean of its divisors is an integer number (1322616552).

Almost surely, 2^3967849653 is an apocalyptic number.

It is an amenable number.

3967849653 is a deficient number, since it is larger than the sum of its proper divisors (1322616555).

3967849653 is a wasteful number, since it uses less digits than its factorization.

3967849653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322616554.

The product of its digits is 29393280, while the sum is 60.

The square root of 3967849653 is about 62990.8696002841. The cubic root of 3967849653 is about 1583.1366484204.

The spelling of 3967849653 in words is "three billion, nine hundred sixty-seven million, eight hundred forty-nine thousand, six hundred fifty-three".