5321978 has 4 divisors (see below), whose sum is σ = 7982970. Its totient is φ = 2660988.

The previous prime is 5321963. The next prime is 5321983. The reversal of 5321978 is 8791235.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8791235 = 5 ⋅1758247.

It can be written as a sum of positive squares in only one way, i.e., 3751969 + 1570009 = 1937^2 + 1253^2 .

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330493 + ... + 1330496.

Almost surely, 2^5321978 is an apocalyptic number.

5321978 is a deficient number, since it is larger than the sum of its proper divisors (2660992).

5321978 is a wasteful number, since it uses less digits than its factorization.

5321978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660991.

The product of its digits is 15120, while the sum is 35.

The square root of 5321978 is about 2306.9412649654. The cubic root of 5321978 is about 174.5920073739.

The spelling of 5321978 in words is "five million, three hundred twenty-one thousand, nine hundred seventy-eight".