1948620889 has 4 divisors (see below), whose sum is σ = 1953709056. Its totient is φ = 1943532724.

The previous prime is 1948620871. The next prime is 1948620911. The reversal of 1948620889 is 9880268491.

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 1948620889 - 2⁵ = 1948620857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1948620859) 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, 2543509 + ... + 2544274.

It is an arithmetic number, because the mean of its divisors is an integer number (488427264).

Almost surely, 2^1948620889 is an apocalyptic number.

It is an amenable number.

1948620889 is a deficient number, since it is larger than the sum of its proper divisors (5088167).

1948620889 is an equidigital number, since it uses as much as digits as its factorization.

1948620889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088166.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The square root of 1948620889 is about 44143.1862125968. The cubic root of 1948620889 is about 1249.0383834112.

The spelling of 1948620889 in words is "one billion, nine hundred forty-eight million, six hundred twenty thousand, eight hundred eighty-nine".