997608782 has 4 divisors (see below), whose sum is σ = 1496413176. Its totient is φ = 498804390.

The previous prime is 997608769. The next prime is 997608797. The reversal of 997608782 is 287806799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 287806799 = 7 ⋅41115257.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249402194 + ... + 249402197.

It is an arithmetic number, because the mean of its divisors is an integer number (374103294).

Almost surely, 2^997608782 is an apocalyptic number.

997608782 is a deficient number, since it is larger than the sum of its proper divisors (498804394).

997608782 is a wasteful number, since it uses less digits than its factorization.

997608782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498804393.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The square root of 997608782 is about 31584.9454962329. The cubic root of 997608782 is about 999.2022911631.

The spelling of 997608782 in words is "nine hundred ninety-seven million, six hundred eight thousand, seven hundred eighty-two".