1974690043 has 2 divisors, whose sum is σ = 1974690044. Its totient is φ = 1974690042.

The previous prime is 1974690023. The next prime is 1974690089. The reversal of 1974690043 is 3400964791.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1974690043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1974690023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987345021 + 987345022.

It is an arithmetic number, because the mean of its divisors is an integer number (987345022).

Almost surely, 2^1974690043 is an apocalyptic number.

1974690043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974690043 is an equidigital number, since it uses as much as digits as its factorization.

1974690043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 1974690043 is about 44437.4846610381. The cubic root of 1974690043 is about 1254.5837136170.

The spelling of 1974690043 in words is "one billion, nine hundred seventy-four million, six hundred ninety thousand, forty-three".