997378 has 4 divisors (see below), whose sum is σ = 1496070. Its totient is φ = 498688.

The previous prime is 997369. The next prime is 997379. The reversal of 997378 is 873799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 954529 + 42849 = 977^2 + 207^2 .

It is not an unprimeable number, because it can be changed into a prime (997379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249343 + ... + 249346.

2⁹⁹⁷³⁷⁸ is an apocalyptic number.

997378 is a deficient number, since it is larger than the sum of its proper divisors (498692).

997378 is a wasteful number, since it uses less digits than its factorization.

997378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498691.

The product of its digits is 95256, while the sum is 43.

The square root of 997378 is about 998.6881395110. The cubic root of 997378 is about 99.9125235009.

The spelling of 997378 in words is "nine hundred ninety-seven thousand, three hundred seventy-eight".