3952417981 has 4 divisors (see below), whose sum is σ = 4160440000. Its totient is φ = 3744395964.

The previous prime is 3952417967. The next prime is 3952417993. The reversal of 3952417981 is 1897142593.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 3952417981 - 2⁷ = 3952417853 is a prime.

It is a super-2 number, since 2×3952417981² = 31243215793064232722, 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 (3952417901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104010981 + ... + 104011018.

It is an arithmetic number, because the mean of its divisors is an integer number (1040110000).

Almost surely, 2^3952417981 is an apocalyptic number.

It is an amenable number.

3952417981 is a deficient number, since it is larger than the sum of its proper divisors (208022019).

3952417981 is a wasteful number, since it uses less digits than its factorization.

3952417981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208022018.

The product of its digits is 544320, while the sum is 49.

The square root of 3952417981 is about 62868.2589308786. The cubic root of 3952417981 is about 1581.0816154525.

The spelling of 3952417981 in words is "three billion, nine hundred fifty-two million, four hundred seventeen thousand, nine hundred eighty-one".