146780477 has 4 divisors (see below), whose sum is σ = 146805120. Its totient is φ = 146755836.

The previous prime is 146780471. The next prime is 146780489. The reversal of 146780477 is 774087641.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 774087641 = 3167 ⋅244423.

It is a cyclic number.

It is not a de Polignac number, because 146780477 - 2⁴ = 146780461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146780471) 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 in 3 ways as a sum of consecutive naturals, for example, 2798 + ... + 17360.

It is an arithmetic number, because the mean of its divisors is an integer number (36701280).

Almost surely, 2^146780477 is an apocalyptic number.

It is an amenable number.

146780477 is a deficient number, since it is larger than the sum of its proper divisors (24643).

146780477 is a wasteful number, since it uses less digits than its factorization.

146780477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24642.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 146780477 is about 12115.2992946935. The cubic root of 146780477 is about 527.5003655201.

The spelling of 146780477 in words is "one hundred forty-six million, seven hundred eighty thousand, four hundred seventy-seven".