396961966 has 4 divisors (see below), whose sum is σ = 595442952. Its totient is φ = 198480982.

The previous prime is 396961949. The next prime is 396961969. The reversal of 396961966 is 669169693.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396961969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99240490 + ... + 99240493.

It is an arithmetic number, because the mean of its divisors is an integer number (148860738).

Almost surely, 2^396961966 is an apocalyptic number.

396961966 is a deficient number, since it is larger than the sum of its proper divisors (198480986).

396961966 is a wasteful number, since it uses less digits than its factorization.

396961966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198480985.

The product of its digits is 2834352, while the sum is 55.

The square root of 396961966 is about 19923.9043864399. The cubic root of 396961966 is about 734.9361883300.

The spelling of 396961966 in words is "three hundred ninety-six million, nine hundred sixty-one thousand, nine hundred sixty-six".