1947493001 has 2 divisors, whose sum is σ = 1947493002. Its totient is φ = 1947493000.

The previous prime is 1947492973. The next prime is 1947493043. The reversal of 1947493001 is 1003947491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1881477376 + 66015625 = 43376^2 + 8125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1947493001 - 2²² = 1943298697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1947493601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973746500 + 973746501.

It is an arithmetic number, because the mean of its divisors is an integer number (973746501).

Almost surely, 2^1947493001 is an apocalyptic number.

It is an amenable number.

1947493001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947493001 is an equidigital number, since it uses as much as digits as its factorization.

1947493001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1947493001 is about 44130.4090282426. The cubic root of 1947493001 is about 1248.7973501578.

The spelling of 1947493001 in words is "one billion, nine hundred forty-seven million, four hundred ninety-three thousand, one".