1997929467 has 24 divisors (see below), whose sum is σ = 2986816560. Its totient is φ = 1286046720.

The previous prime is 1997929463. The next prime is 1997929469. The reversal of 1997929467 is 7649297991.

It is not a de Polignac number, because 1997929467 - 2² = 1997929463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997929463) 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 in 23 ways as a sum of consecutive naturals, for example, 7884 + ... + 63702.

It is an arithmetic number, because the mean of its divisors is an integer number (124450690).

Almost surely, 2^1997929467 is an apocalyptic number.

1997929467 is a deficient number, since it is larger than the sum of its proper divisors (988887093).

1997929467 is a wasteful number, since it uses less digits than its factorization.

1997929467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55963 (or 55960 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 63.

The square root of 1997929467 is about 44698.2042927901. The cubic root of 1997929467 is about 1259.4861150840.

The spelling of 1997929467 in words is "one billion, nine hundred ninety-seven million, nine hundred twenty-nine thousand, four hundred sixty-seven".