37840871947 has 2 divisors, whose sum is σ = 37840871948. Its totient is φ = 37840871946.

The previous prime is 37840871933. The next prime is 37840871983. The reversal of 37840871947 is 74917804873.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37840871947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 37840871891 and 37840871900.

It is not a weakly prime, because it can be changed into another prime (37840871927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18920435973 + 18920435974.

It is an arithmetic number, because the mean of its divisors is an integer number (18920435974).

Almost surely, 2^37840871947 is an apocalyptic number.

37840871947 is a deficient number, since it is larger than the sum of its proper divisors (1).

37840871947 is an equidigital number, since it uses as much as digits as its factorization.

37840871947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 37840871947 in words is "thirty-seven billion, eight hundred forty million, eight hundred seventy-one thousand, nine hundred forty-seven".