1970749421 has 2 divisors, whose sum is σ = 1970749422. Its totient is φ = 1970749420.

The previous prime is 1970749399. The next prime is 1970749477. The reversal of 1970749421 is 1249470791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1498773796 + 471975625 = 38714^2 + 21725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970749421 - 2⁶ = 1970749357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970749481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985374710 + 985374711.

It is an arithmetic number, because the mean of its divisors is an integer number (985374711).

Almost surely, 2^1970749421 is an apocalyptic number.

It is an amenable number.

1970749421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970749421 is an equidigital number, since it uses as much as digits as its factorization.

1970749421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1970749421 is about 44393.1235778696. The cubic root of 1970749421 is about 1253.7486234999.

The spelling of 1970749421 in words is "one billion, nine hundred seventy million, seven hundred forty-nine thousand, four hundred twenty-one".