4691978 has 4 divisors (see below), whose sum is σ = 7037970. Its totient is φ = 2345988.

The previous prime is 4691969. The next prime is 4691989. The reversal of 4691978 is 8791964.

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., 4609609 + 82369 = 2147^2 + 287^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172993 + ... + 1172996.

Almost surely, 2^4691978 is an apocalyptic number.

4691978 is a deficient number, since it is larger than the sum of its proper divisors (2345992).

4691978 is a wasteful number, since it uses less digits than its factorization.

4691978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345991.

The product of its digits is 108864, while the sum is 44.

The square root of 4691978 is about 2166.0974123986. The cubic root of 4691978 is about 167.4115133726.

The spelling of 4691978 in words is "four million, six hundred ninety-one thousand, nine hundred seventy-eight".