1047969831 has 4 divisors (see below), whose sum is σ = 1397293112. Its totient is φ = 698646552.

The previous prime is 1047969827. The next prime is 1047969851. The reversal of 1047969831 is 1389697401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1389697401 = 3 ⋅463232467.

It is not a de Polignac number, because 1047969831 - 2² = 1047969827 is a prime.

It is a super-2 number, since 2×1047969831² = 2196481533372337122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047969821) 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, 174661636 + ... + 174661641.

It is an arithmetic number, because the mean of its divisors is an integer number (349323278).

Almost surely, 2^1047969831 is an apocalyptic number.

1047969831 is a deficient number, since it is larger than the sum of its proper divisors (349323281).

1047969831 is an equidigital number, since it uses as much as digits as its factorization.

1047969831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349323280.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 1047969831 is about 32372.3621473627. The cubic root of 1047969831 is about 1015.7408686563.

The spelling of 1047969831 in words is "one billion, forty-seven million, nine hundred sixty-nine thousand, eight hundred thirty-one".