1948998491 has 12 divisors (see below), whose sum is σ = 2172407640. Its totient is φ = 1734096960.

The previous prime is 1948998487. The next prime is 1948998497.

1948998491 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1948998491 - 2² = 1948998487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1948998497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15806 + ... + 64403.

It is an arithmetic number, because the mean of its divisors is an integer number (181033970).

Almost surely, 2^1948998491 is an apocalyptic number.

1948998491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1948998491 is a deficient number, since it is larger than the sum of its proper divisors (223409149).

1948998491 is an equidigital number, since it uses as much as digits as its factorization.

1948998491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80314 (or 80267 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 62.

The square root of 1948998491 is about 44147.4630188418. The cubic root of 1948998491 is about 1249.1190573779.

The spelling of 1948998491 in words is "one billion, nine hundred forty-eight million, nine hundred ninety-eight thousand, four hundred ninety-one".