3967939261 has 16 divisors (see below), whose sum is σ = 4667826240. Its totient is φ = 3325317120.

The previous prime is 3967939259. The next prime is 3967939289. The reversal of 3967939261 is 1629397693.

It is a cyclic number.

It is not a de Polignac number, because 3967939261 - 2¹ = 3967939259 is a prime.

It is a super-2 number, since 2×3967939261² = 31489083957970452242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967939201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91926 + ... + 128008.

It is an arithmetic number, because the mean of its divisors is an integer number (291739140).

Almost surely, 2^3967939261 is an apocalyptic number.

It is an amenable number.

3967939261 is a deficient number, since it is larger than the sum of its proper divisors (699886979).

3967939261 is a wasteful number, since it uses less digits than its factorization.

3967939261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36876.

The product of its digits is 3306744, while the sum is 55.

The square root of 3967939261 is about 62991.5808739549. The cubic root of 3967939261 is about 1583.1485659284.

The spelling of 3967939261 in words is "three billion, nine hundred sixty-seven million, nine hundred thirty-nine thousand, two hundred sixty-one".