1642674343 has 2 divisors, whose sum is σ = 1642674344. Its totient is φ = 1642674342.

The previous prime is 1642674337. The next prime is 1642674409. The reversal of 1642674343 is 3434762461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642674343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642674296 and 1642674305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642674323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821337171 + 821337172.

It is an arithmetic number, because the mean of its divisors is an integer number (821337172).

Almost surely, 2^1642674343 is an apocalyptic number.

1642674343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642674343 is an equidigital number, since it uses as much as digits as its factorization.

1642674343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 40.

The square root of 1642674343 is about 40529.9191092210. The cubic root of 1642674343 is about 1179.9143725570.

The spelling of 1642674343 in words is "one billion, six hundred forty-two million, six hundred seventy-four thousand, three hundred forty-three".