19122949 has 4 divisors (see below), whose sum is σ = 20129440. Its totient is φ = 18116460.

The previous prime is 19122947. The next prime is 19122967. The reversal of 19122949 is 94922191.

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 not a de Polignac number, because 19122949 - 2¹ = 19122947 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 (19122947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503217 + ... + 503254.

It is an arithmetic number, because the mean of its divisors is an integer number (5032360).

Almost surely, 2^19122949 is an apocalyptic number.

19122949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19122949 is a deficient number, since it is larger than the sum of its proper divisors (1006491).

19122949 is a wasteful number, since it uses less digits than its factorization.

19122949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006490.

The product of its digits is 11664, while the sum is 37.

The square root of 19122949 is about 4372.9794191146. The cubic root of 19122949 is about 267.4145020383.

The spelling of 19122949 in words is "nineteen million, one hundred twenty-two thousand, nine hundred forty-nine".