1001997929 has 2 divisors, whose sum is σ = 1001997930. Its totient is φ = 1001997928.

The previous prime is 1001997923. The next prime is 1001997943. The reversal of 1001997929 is 9297991001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669774400 + 332223529 = 25880^2 + 18227^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001997929 - 2⁸ = 1001997673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001997923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500998964 + 500998965.

It is an arithmetic number, because the mean of its divisors is an integer number (500998965).

Almost surely, 2^1001997929 is an apocalyptic number.

It is an amenable number.

1001997929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001997929 is an equidigital number, since it uses as much as digits as its factorization.

1001997929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 47.

The square root of 1001997929 is about 31654.3508699831. The cubic root of 1001997929 is about 1000.6655333005.

The spelling of 1001997929 in words is "one billion, one million, nine hundred ninety-seven thousand, nine hundred twenty-nine".