1948172831 has 4 divisors (see below), whose sum is σ = 2125279464. Its totient is φ = 1771066200.

The previous prime is 1948172801. The next prime is 1948172833. The reversal of 1948172831 is 1382718491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1948172831 - 2¹⁰ = 1948171807 is a prime.

It is a super-2 number, since 2×1948172831² = 7590754758893109122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948172833) 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, 88553300 + ... + 88553321.

It is an arithmetic number, because the mean of its divisors is an integer number (531319866).

Almost surely, 2^1948172831 is an apocalyptic number.

1948172831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1948172831 is a deficient number, since it is larger than the sum of its proper divisors (177106633).

1948172831 is a wasteful number, since it uses less digits than its factorization.

1948172831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177106632.

The product of its digits is 96768, while the sum is 44.

The square root of 1948172831 is about 44138.1108680469. The cubic root of 1948172831 is about 1248.9426431293.

The spelling of 1948172831 in words is "one billion, nine hundred forty-eight million, one hundred seventy-two thousand, eight hundred thirty-one".