8400955 has 4 divisors (see below), whose sum is σ = 10081152. Its totient is φ = 6720760.

The previous prime is 8400943. The next prime is 8400967. The reversal of 8400955 is 5590048.

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

It is an interprime number because it is at equal distance from previous prime (8400943) and next prime (8400967).

It is not a de Polignac number, because 8400955 - 2¹³ = 8392763 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840091 + ... + 840100.

It is an arithmetic number, because the mean of its divisors is an integer number (2520288).

Almost surely, 2^8400955 is an apocalyptic number.

8400955 is a deficient number, since it is larger than the sum of its proper divisors (1680197).

8400955 is a wasteful number, since it uses less digits than its factorization.

8400955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680196.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 8400955 is about 2898.4400977077. The cubic root of 8400955 is about 203.2869747101.

The spelling of 8400955 in words is "eight million, four hundred thousand, nine hundred fifty-five".