815196949 has 4 divisors (see below), whose sum is σ = 931653664. Its totient is φ = 698740236.

The previous prime is 815196911. The next prime is 815196959. The reversal of 815196949 is 949691518.

It is a happy number.

815196949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-815196949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815196896 and 815196905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815196959) 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, 58228347 + ... + 58228360.

It is an arithmetic number, because the mean of its divisors is an integer number (232913416).

Almost surely, 2^815196949 is an apocalyptic number.

It is an amenable number.

815196949 is a deficient number, since it is larger than the sum of its proper divisors (116456715).

815196949 is a wasteful number, since it uses less digits than its factorization.

815196949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116456714.

The product of its digits is 699840, while the sum is 52.

The square root of 815196949 is about 28551.6540501597. The cubic root of 815196949 is about 934.1590994464.

The spelling of 815196949 in words is "eight hundred fifteen million, one hundred ninety-six thousand, nine hundred forty-nine".