78964946 has 4 divisors (see below), whose sum is σ = 118447422. Its totient is φ = 39482472.

The previous prime is 78964943. The next prime is 78964973. The reversal of 78964946 is 64946987.

It is a happy number.

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., 68973025 + 9991921 = 8305^2 + 3161^2 .

It is not an unprimeable number, because it can be changed into a prime (78964943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19741235 + ... + 19741238.

Almost surely, 2^78964946 is an apocalyptic number.

78964946 is a deficient number, since it is larger than the sum of its proper divisors (39482476).

78964946 is a wasteful number, since it uses less digits than its factorization.

78964946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39482475.

The product of its digits is 2612736, while the sum is 53.

The square root of 78964946 is about 8886.2222569549. Note that the first 4 decimals coincide. The cubic root of 78964946 is about 429.0205687057.

The spelling of 78964946 in words is "seventy-eight million, nine hundred sixty-four thousand, nine hundred forty-six".