1997470799 has 4 divisors (see below), whose sum is σ = 2027283864. Its totient is φ = 1967657736.

The previous prime is 1997470763. The next prime is 1997470843. The reversal of 1997470799 is 9970747991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9970747991 = 9733 ⋅1024427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997470799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997470999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14906432 + ... + 14906565.

It is an arithmetic number, because the mean of its divisors is an integer number (506820966).

Almost surely, 2^1997470799 is an apocalyptic number.

1997470799 is a deficient number, since it is larger than the sum of its proper divisors (29813065).

1997470799 is an equidigital number, since it uses as much as digits as its factorization.

1997470799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29813064.

The product of its (nonzero) digits is 9001692, while the sum is 62.

The square root of 1997470799 is about 44693.0732776344. The cubic root of 1997470799 is about 1259.3897269316.

The spelling of 1997470799 in words is "one billion, nine hundred ninety-seven million, four hundred seventy thousand, seven hundred ninety-nine".