19098949 has 4 divisors (see below), whose sum is σ = 19422720. Its totient is φ = 18775180.

The previous prime is 19098943. The next prime is 19098983. The reversal of 19098949 is 94989091.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94989091 = 53 ⋅1792247.

It is a cyclic number.

It is not a de Polignac number, because 19098949 - 2³ = 19098941 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 (19098941) 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, 161797 + ... + 161914.

It is an arithmetic number, because the mean of its divisors is an integer number (4855680).

Almost surely, 2^19098949 is an apocalyptic number.

It is an amenable number.

19098949 is a deficient number, since it is larger than the sum of its proper divisors (323771).

19098949 is an equidigital number, since it uses as much as digits as its factorization.

19098949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323770.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 19098949 is about 4370.2344330711. The cubic root of 19098949 is about 267.3025835463.

The spelling of 19098949 in words is "nineteen million, ninety-eight thousand, nine hundred forty-nine".