146267978 has 4 divisors (see below), whose sum is σ = 219401970. Its totient is φ = 73133988.

The previous prime is 146267977. The next prime is 146267987. The reversal of 146267978 is 879762641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879762641 = 3217 ⋅273473.

It can be written as a sum of positive squares in only one way, i.e., 78978769 + 67289209 = 8887^2 + 8203^2 .

It is not an unprimeable number, because it can be changed into a prime (146267977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36566993 + ... + 36566996.

Almost surely, 2^146267978 is an apocalyptic number.

146267978 is a deficient number, since it is larger than the sum of its proper divisors (73133992).

146267978 is an equidigital number, since it uses as much as digits as its factorization.

146267978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73133991.

The product of its digits is 1016064, while the sum is 50.

The square root of 146267978 is about 12094.1298984259. The cubic root of 146267978 is about 526.8857091503.

The spelling of 146267978 in words is "one hundred forty-six million, two hundred sixty-seven thousand, nine hundred seventy-eight".