1720097973 has 24 divisors (see below), whose sum is σ = 2737309536. Its totient is φ = 1032156000.

The previous prime is 1720097957. The next prime is 1720097983. The reversal of 1720097973 is 3797900271.

It is not a de Polignac number, because 1720097973 - 2⁴ = 1720097957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720097933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76015 + ... + 96012.

It is an arithmetic number, because the mean of its divisors is an integer number (114054564).

Almost surely, 2^1720097973 is an apocalyptic number.

It is an amenable number.

1720097973 is a deficient number, since it is larger than the sum of its proper divisors (1017211563).

1720097973 is a wasteful number, since it uses less digits than its factorization.

1720097973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172145 (or 172142 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 1720097973 is about 41474.0638592362. The cubic root of 1720097973 is about 1198.1680317502.

The spelling of 1720097973 in words is "one billion, seven hundred twenty million, ninety-seven thousand, nine hundred seventy-three".