981696493 has 4 divisors (see below), whose sum is σ = 1004526688. Its totient is φ = 958866300.

The previous prime is 981696449. The next prime is 981696509. The reversal of 981696493 is 394696189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981696493 is a prime.

It is a super-3 number, since 3×981696493³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981696403) 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, 11415033 + ... + 11415118.

It is an arithmetic number, because the mean of its divisors is an integer number (251131672).

Almost surely, 2^981696493 is an apocalyptic number.

It is an amenable number.

981696493 is a deficient number, since it is larger than the sum of its proper divisors (22830195).

981696493 is a wasteful number, since it uses less digits than its factorization.

981696493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22830194.

The product of its digits is 2519424, while the sum is 55.

The square root of 981696493 is about 31332.0362089667. The cubic root of 981696493 is about 993.8612235359.

The spelling of 981696493 in words is "nine hundred eighty-one million, six hundred ninety-six thousand, four hundred ninety-three".