1642347743 has 4 divisors (see below), whose sum is σ = 1677291360. Its totient is φ = 1607404128.

The previous prime is 1642347731. The next prime is 1642347793. The reversal of 1642347743 is 3477432461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3477432461 = 8329 ⋅417509.

It is a cyclic number.

It is not a de Polignac number, because 1642347743 - 2⁴ = 1642347727 is a prime.

It is a super-2 number, since 2×1642347743² = 5394612217874388098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642347743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642347703) 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, 17471738 + ... + 17471831.

It is an arithmetic number, because the mean of its divisors is an integer number (419322840).

Almost surely, 2^1642347743 is an apocalyptic number.

1642347743 is a deficient number, since it is larger than the sum of its proper divisors (34943617).

1642347743 is an equidigital number, since it uses as much as digits as its factorization.

1642347743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34943616.

The product of its digits is 338688, while the sum is 41.

The square root of 1642347743 is about 40525.8897866537. The cubic root of 1642347743 is about 1179.8361696805.

The spelling of 1642347743 in words is "one billion, six hundred forty-two million, three hundred forty-seven thousand, seven hundred forty-three".