1971712497 has 32 divisors (see below), whose sum is σ = 2737152000. Its totient is φ = 1261636992.

The previous prime is 1971712489. The next prime is 1971712531. The reversal of 1971712497 is 7942171791.

It is not a de Polignac number, because 1971712497 - 2³ = 1971712489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1971712447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2284288 + ... + 2285150.

It is an arithmetic number, because the mean of its divisors is an integer number (85536000).

Almost surely, 2^1971712497 is an apocalyptic number.

It is an amenable number.

1971712497 is a deficient number, since it is larger than the sum of its proper divisors (765439503).

1971712497 is a wasteful number, since it uses less digits than its factorization.

1971712497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197.

The product of its digits is 222264, while the sum is 48.

The square root of 1971712497 is about 44403.9693833783. The cubic root of 1971712497 is about 1253.9528196906.

The spelling of 1971712497 in words is "one billion, nine hundred seventy-one million, seven hundred twelve thousand, four hundred ninety-seven".