1948031549 has 4 divisors (see below), whose sum is σ = 1949722236. Its totient is φ = 1946340864.

The previous prime is 1948031543. The next prime is 1948031551. The reversal of 1948031549 is 9451308491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1352915524 + 595116025 = 36782^2 + 24395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1948031549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948031543) 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, 843614 + ... + 845919.

It is an arithmetic number, because the mean of its divisors is an integer number (487430559).

Almost surely, 2^1948031549 is an apocalyptic number.

It is an amenable number.

1948031549 is a deficient number, since it is larger than the sum of its proper divisors (1690687).

1948031549 is a wasteful number, since it uses less digits than its factorization.

1948031549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690686.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1948031549 is about 44136.5103853941. The cubic root of 1948031549 is about 1248.9124511845.

The spelling of 1948031549 in words is "one billion, nine hundred forty-eight million, thirty-one thousand, five hundred forty-nine".