1948171493 has 2 divisors, whose sum is σ = 1948171494. Its totient is φ = 1948171492.

The previous prime is 1948171453. The next prime is 1948171499. The reversal of 1948171493 is 3941718491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143995329 + 804176164 = 33823^2 + 28358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948171493 - 2²⁴ = 1931394277 is a prime.

It is a super-2 number, since 2×1948171493² = 7590744332275698098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1948171499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974085746 + 974085747.

It is an arithmetic number, because the mean of its divisors is an integer number (974085747).

Almost surely, 2^1948171493 is an apocalyptic number.

It is an amenable number.

1948171493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948171493 is an equidigital number, since it uses as much as digits as its factorization.

1948171493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 1948171493 is about 44138.0957110748. The cubic root of 1948171493 is about 1248.9423572058.

The spelling of 1948171493 in words is "one billion, nine hundred forty-eight million, one hundred seventy-one thousand, four hundred ninety-three".