74091998287 has 2 divisors, whose sum is σ = 74091998288. Its totient is φ = 74091998286.

The previous prime is 74091998273. The next prime is 74091998311. The reversal of 74091998287 is 78289919047.

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-74091998287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74091998257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37045999143 + 37045999144.

It is an arithmetic number, because the mean of its divisors is an integer number (37045999144).

Almost surely, 2^74091998287 is an apocalyptic number.

74091998287 is a deficient number, since it is larger than the sum of its proper divisors (1).

74091998287 is an equidigital number, since it uses as much as digits as its factorization.

74091998287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 64.

The spelling of 74091998287 in words is "seventy-four billion, ninety-one million, nine hundred ninety-eight thousand, two hundred eighty-seven".