1047661813 has 4 divisors (see below), whose sum is σ = 1142903808. Its totient is φ = 952419820.

The previous prime is 1047661777. The next prime is 1047661837. The reversal of 1047661813 is 3181667401.

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.

It is not a de Polignac number, because 1047661813 - 2⁹ = 1047661301 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 (1047661883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47620981 + ... + 47621002.

It is an arithmetic number, because the mean of its divisors is an integer number (285725952).

Almost surely, 2^1047661813 is an apocalyptic number.

It is an amenable number.

1047661813 is a deficient number, since it is larger than the sum of its proper divisors (95241995).

1047661813 is an equidigital number, since it uses as much as digits as its factorization.

1047661813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95241994.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1047661813 is about 32367.6043753627. The cubic root of 1047661813 is about 1015.6413438039.

The spelling of 1047661813 in words is "one billion, forty-seven million, six hundred sixty-one thousand, eight hundred thirteen".