9497913781 has 8 divisors (see below), whose sum is σ = 10016930720. Its totient is φ = 8980809552.

The previous prime is 9497913773. The next prime is 9497913793. The reversal of 9497913781 is 1873197949.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9497913781 - 2³ = 9497913773 is a prime.

It is a super-2 number, since 2×9497913781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9497913731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467970 + ... + 487843.

It is an arithmetic number, because the mean of its divisors is an integer number (1252116340).

Almost surely, 2^9497913781 is an apocalyptic number.

It is an amenable number.

9497913781 is a deficient number, since it is larger than the sum of its proper divisors (519016939).

9497913781 is a wasteful number, since it uses less digits than its factorization.

9497913781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956355.

The product of its digits is 3429216, while the sum is 58.

The square root of 9497913781 is about 97457.2407828172. The cubic root of 9497913781 is about 2117.7567482225.

The spelling of 9497913781 in words is "nine billion, four hundred ninety-seven million, nine hundred thirteen thousand, seven hundred eighty-one".