1948288997 has 4 divisors (see below), whose sum is σ = 1948394976. Its totient is φ = 1948183020.

The previous prime is 1948288949. The next prime is 1948289027. The reversal of 1948288997 is 7998828491.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1948288997 - 2¹² = 1948284901 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 (1948287997) 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, 17483 + ... + 64824.

It is an arithmetic number, because the mean of its divisors is an integer number (487098744).

Almost surely, 2^1948288997 is an apocalyptic number.

It is an amenable number.

1948288997 is a deficient number, since it is larger than the sum of its proper divisors (105979).

1948288997 is an equidigital number, since it uses as much as digits as its factorization.

1948288997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105978.

The product of its digits is 20901888, while the sum is 65.

The square root of 1948288997 is about 44139.4267860379. The cubic root of 1948288997 is about 1248.9674666948.

The spelling of 1948288997 in words is "one billion, nine hundred forty-eight million, two hundred eighty-eight thousand, nine hundred ninety-seven".