396551 has 4 divisors (see below), whose sum is σ = 398352. Its totient is φ = 394752.

The previous prime is 396547. The next prime is 396563. The reversal of 396551 is 155693.

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

It is not a de Polignac number, because 396551 - 2² = 396547 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 (396541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515 + ... + 1028.

It is an arithmetic number, because the mean of its divisors is an integer number (99588).

2³⁹⁶⁵⁵¹ is an apocalyptic number.

396551 is a deficient number, since it is larger than the sum of its proper divisors (1801).

396551 is a wasteful number, since it uses less digits than its factorization.

396551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800.

The product of its digits is 4050, while the sum is 29.

The square root of 396551 is about 629.7229549572. The cubic root of 396551 is about 73.4682479662.

The spelling of 396551 in words is "three hundred ninety-six thousand, five hundred fifty-one".