399666962 has 4 divisors (see below), whose sum is σ = 599500446. Its totient is φ = 199833480.

The previous prime is 399666961. The next prime is 399666977. The reversal of 399666962 is 269666993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 269666993 = 59 ⋅4570627.

It can be written as a sum of positive squares in only one way, i.e., 333391081 + 66275881 = 18259^2 + 8141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 399666898 and 399666907.

It is not an unprimeable number, because it can be changed into a prime (399666961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99916739 + ... + 99916742.

Almost surely, 2^399666962 is an apocalyptic number.

399666962 is a deficient number, since it is larger than the sum of its proper divisors (199833484).

399666962 is a wasteful number, since it uses less digits than its factorization.

399666962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199833483.

The product of its digits is 5668704, while the sum is 56.

The square root of 399666962 is about 19991.6723162421. The cubic root of 399666962 is about 736.6017558698.

The spelling of 399666962 in words is "three hundred ninety-nine million, six hundred sixty-six thousand, nine hundred sixty-two".