8158949 has 4 divisors (see below), whose sum is σ = 8348736. Its totient is φ = 7969164.

The previous prime is 8158919. The next prime is 8158967. The reversal of 8158949 is 9498518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8158949 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 (8158919) 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, 94829 + ... + 94914.

It is an arithmetic number, because the mean of its divisors is an integer number (2087184).

Almost surely, 2^8158949 is an apocalyptic number.

It is an amenable number.

8158949 is a deficient number, since it is larger than the sum of its proper divisors (189787).

8158949 is a wasteful number, since it uses less digits than its factorization.

8158949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189786.

The product of its digits is 103680, while the sum is 44.

The square root of 8158949 is about 2856.3874036972. The cubic root of 8158949 is about 201.3158980730.

The spelling of 8158949 in words is "eight million, one hundred fifty-eight thousand, nine hundred forty-nine".