40897328947 has 2 divisors, whose sum is σ = 40897328948. Its totient is φ = 40897328946.

The previous prime is 40897328903. The next prime is 40897329073. The reversal of 40897328947 is 74982379804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40897328947 is a prime.

It is not a weakly prime, because it can be changed into another prime (40897328347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20448664473 + 20448664474.

It is an arithmetic number, because the mean of its divisors is an integer number (20448664474).

Almost surely, 2^40897328947 is an apocalyptic number.

40897328947 is a deficient number, since it is larger than the sum of its proper divisors (1).

40897328947 is an equidigital number, since it uses as much as digits as its factorization.

40897328947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 40897328947 in words is "forty billion, eight hundred ninety-seven million, three hundred twenty-eight thousand, nine hundred forty-seven".