1697972071 has 4 divisors (see below), whose sum is σ = 1706019544. Its totient is φ = 1689924600.

The previous prime is 1697972063. The next prime is 1697972117. The reversal of 1697972071 is 1702797961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1702797961 = 257 ⋅6625673.

It is a cyclic number.

It is not a de Polignac number, because 1697972071 - 2³ = 1697972063 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 (1697972371) 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, 4023420 + ... + 4023841.

It is an arithmetic number, because the mean of its divisors is an integer number (426504886).

Almost surely, 2^1697972071 is an apocalyptic number.

1697972071 is a deficient number, since it is larger than the sum of its proper divisors (8047473).

1697972071 is an equidigital number, since it uses as much as digits as its factorization.

1697972071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047472.

The product of its (nonzero) digits is 333396, while the sum is 49.

The square root of 1697972071 is about 41206.4566664012. The cubic root of 1697972071 is about 1193.0084346322.

The spelling of 1697972071 in words is "one billion, six hundred ninety-seven million, nine hundred seventy-two thousand, seventy-one".