396819554 has 4 divisors (see below), whose sum is σ = 595229334. Its totient is φ = 198409776.

The previous prime is 396819481. The next prime is 396819581. The reversal of 396819554 is 455918693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455918693 = 149 ⋅3059857.

It can be written as a sum of positive squares in only one way, i.e., 271491529 + 125328025 = 16477^2 + 11195^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99204887 + ... + 99204890.

Almost surely, 2^396819554 is an apocalyptic number.

396819554 is a deficient number, since it is larger than the sum of its proper divisors (198409780).

396819554 is a wasteful number, since it uses less digits than its factorization.

396819554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198409779.

The product of its digits is 1166400, while the sum is 50.

The square root of 396819554 is about 19920.3301679465. The cubic root of 396819554 is about 734.8482905294.

The spelling of 396819554 in words is "three hundred ninety-six million, eight hundred nineteen thousand, five hundred fifty-four".