1243473431 has 2 divisors, whose sum is σ = 1243473432. Its totient is φ = 1243473430.

The previous prime is 1243473421. The next prime is 1243473433. The reversal of 1243473431 is 1343743421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243473431 - 2⁶ = 1243473367 is a prime.

It is a super-2 number, since 2×1243473431² = 3092452347205823522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1243473433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243473433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621736715 + 621736716.

It is an arithmetic number, because the mean of its divisors is an integer number (621736716).

Almost surely, 2^1243473431 is an apocalyptic number.

1243473431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243473431 is an equidigital number, since it uses as much as digits as its factorization.

1243473431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 32.

The square root of 1243473431 is about 35262.9186398404. The cubic root of 1243473431 is about 1075.3392636781.

The spelling of 1243473431 in words is "one billion, two hundred forty-three million, four hundred seventy-three thousand, four hundred thirty-one".