9997378 has 4 divisors (see below), whose sum is σ = 14996070. Its totient is φ = 4998688.

The previous prime is 9997367. The next prime is 9997381. The reversal of 9997378 is 8737999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8737999 = 23 ⋅379913.

It can be written as a sum of positive squares in only one way, i.e., 8139609 + 1857769 = 2853^2 + 1363^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499343 + ... + 2499346.

Almost surely, 2^9997378 is an apocalyptic number.

9997378 is a deficient number, since it is larger than the sum of its proper divisors (4998692).

9997378 is a wasteful number, since it uses less digits than its factorization.

9997378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998691.

The product of its digits is 857304, while the sum is 52.

The square root of 9997378 is about 3161.8630583882. The cubic root of 9997378 is about 215.4246375980.

The spelling of 9997378 in words is "nine million, nine hundred ninety-seven thousand, three hundred seventy-eight".