78750946 has 4 divisors (see below), whose sum is σ = 118126422. Its totient is φ = 39375472.

The previous prime is 78750941. The next prime is 78750949. The reversal of 78750946 is 64905787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64905787 = 197 ⋅329471.

It can be written as a sum of positive squares in only one way, i.e., 46771921 + 31979025 = 6839^2 + 5655^2 .

It is a super-2 number, since 2×78750946² = 12403422991789832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78750896 and 78750905.

It is not an unprimeable number, because it can be changed into a prime (78750941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19687735 + ... + 19687738.

Almost surely, 2^78750946 is an apocalyptic number.

78750946 is a deficient number, since it is larger than the sum of its proper divisors (39375476).

78750946 is a wasteful number, since it uses less digits than its factorization.

78750946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39375475.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 78750946 is about 8874.1729755510. The cubic root of 78750946 is about 428.6326604469.

The spelling of 78750946 in words is "seventy-eight million, seven hundred fifty thousand, nine hundred forty-six".