1098954149 has 4 divisors (see below), whose sum is σ = 1099403520. Its totient is φ = 1098504780.

The previous prime is 1098954133. The next prime is 1098954161. The reversal of 1098954149 is 9414598901.

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: 9414598901 = 23 ⋅409330387.

It is a cyclic number.

It is not a de Polignac number, because 1098954149 - 2⁴ = 1098954133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098954097 and 1098954106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098954169) 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, 220997 + ... + 225914.

It is an arithmetic number, because the mean of its divisors is an integer number (274850880).

Almost surely, 2^1098954149 is an apocalyptic number.

It is an amenable number.

1098954149 is a deficient number, since it is larger than the sum of its proper divisors (449371).

1098954149 is an equidigital number, since it uses as much as digits as its factorization.

1098954149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449370.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1098954149 is about 33150.4773570457. The cubic root of 1098954149 is about 1031.9528568118.

The spelling of 1098954149 in words is "one billion, ninety-eight million, nine hundred fifty-four thousand, one hundred forty-nine".