3907169981 has 36 divisors (see below), whose sum is σ = 4683894516. Its totient is φ = 3255183360.

The previous prime is 3907169953. The next prime is 3907169983. The reversal of 3907169981 is 1899617093.

It can be written as a sum of positive squares in 6 ways, for example, as 1177107481 + 2730062500 = 34309^2 + 52250^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3907169981 is a prime.

It is a super-2 number, since 2×3907169981² = 30531954520855080722, 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 (3907169983) 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 35 ways as a sum of consecutive naturals, for example, 3209885 + ... + 3211101.

It is an arithmetic number, because the mean of its divisors is an integer number (130108181).

Almost surely, 2^3907169981 is an apocalyptic number.

It is an amenable number.

3907169981 is a deficient number, since it is larger than the sum of its proper divisors (776724535).

3907169981 is a wasteful number, since it uses less digits than its factorization.

3907169981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 3907169981 is about 62507.3594147121. The cubic root of 3907169981 is about 1575.0249403626.

The spelling of 3907169981 in words is "three billion, nine hundred seven million, one hundred sixty-nine thousand, nine hundred eighty-one".