3961661962 has 4 divisors (see below), whose sum is σ = 5942492946. Its totient is φ = 1980830980.

The previous prime is 3961661927. The next prime is 3961662043. The reversal of 3961661962 is 2691661693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3956284201 + 5377761 = 62899^2 + 2319^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990415489 + ... + 990415492.

Almost surely, 2^3961661962 is an apocalyptic number.

3961661962 is a deficient number, since it is larger than the sum of its proper divisors (1980830984).

3961661962 is a wasteful number, since it uses less digits than its factorization.

3961661962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980830983.

The product of its digits is 629856, while the sum is 49.

The square root of 3961661962 is about 62941.7346599218. The cubic root of 3961661962 is about 1582.3132757466.

The spelling of 3961661962 in words is "three billion, nine hundred sixty-one million, six hundred sixty-one thousand, nine hundred sixty-two".