396121287 has 8 divisors (see below), whose sum is σ = 535397104. Its totient is φ = 260463168.

The previous prime is 396121277. The next prime is 396121303. The reversal of 396121287 is 782121693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 396121287 - 2²³ = 387732679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396121207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904168 + ... + 904605.

It is an arithmetic number, because the mean of its divisors is an integer number (66924638).

Almost surely, 2^396121287 is an apocalyptic number.

396121287 is a deficient number, since it is larger than the sum of its proper divisors (139275817).

396121287 is a wasteful number, since it uses less digits than its factorization.

396121287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808849.

The product of its digits is 36288, while the sum is 39.

The square root of 396121287 is about 19902.7959593621. The cubic root of 396121287 is about 734.4170100537.

The spelling of 396121287 in words is "three hundred ninety-six million, one hundred twenty-one thousand, two hundred eighty-seven".