1997069345 has 4 divisors (see below), whose sum is σ = 2396483220. Its totient is φ = 1597655472.

The previous prime is 1997069303. The next prime is 1997069401. The reversal of 1997069345 is 5439607991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5439607991 = 331 ⋅16433861.

It can be written as a sum of positive squares in 2 ways, for example, as 735114769 + 1261954576 = 27113^2 + 35524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997069345 - 2⁶ = 1997069281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199706930 + ... + 199706939.

It is an arithmetic number, because the mean of its divisors is an integer number (599120805).

Almost surely, 2^1997069345 is an apocalyptic number.

It is an amenable number.

1997069345 is a deficient number, since it is larger than the sum of its proper divisors (399413875).

1997069345 is an equidigital number, since it uses as much as digits as its factorization.

1997069345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399413874.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 1997069345 is about 44688.5818190732. The cubic root of 1997069345 is about 1259.3053500755.

The spelling of 1997069345 in words is "one billion, nine hundred ninety-seven million, sixty-nine thousand, three hundred forty-five".