1373631043 has 4 divisors (see below), whose sum is σ = 1373705200. Its totient is φ = 1373556888.

The previous prime is 1373631019. The next prime is 1373631067. The reversal of 1373631043 is 3401363731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3401363731 = 41 ⋅82960091.

It is an interprime number because it is at equal distance from previous prime (1373631019) and next prime (1373631067).

It is a cyclic number.

It is not a de Polignac number, because 1373631043 - 2²⁵ = 1340076611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1373630996 and 1373631014.

It is not an unprimeable number, because it can be changed into a prime (1373631013) 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, 16933 + ... + 55081.

It is an arithmetic number, because the mean of its divisors is an integer number (343426300).

Almost surely, 2^1373631043 is an apocalyptic number.

1373631043 is a deficient number, since it is larger than the sum of its proper divisors (74157).

1373631043 is an equidigital number, since it uses as much as digits as its factorization.

1373631043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74156.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 1373631043 is about 37062.5288262957. The cubic root of 1373631043 is about 1111.6208884293.

Adding to 1373631043 its reverse (3401363731), we get a palindrome (4774994774).

The spelling of 1373631043 in words is "one billion, three hundred seventy-three million, six hundred thirty-one thousand, forty-three".