148978513 has 2 divisors, whose sum is σ = 148978514. Its totient is φ = 148978512.

The previous prime is 148978507. The next prime is 148978537. The reversal of 148978513 is 315879841.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80138304 + 68840209 = 8952^2 + 8297^2 .

It is a cyclic number.

It is not a de Polignac number, because 148978513 - 2⁹ = 148978001 is a prime.

It is not a weakly prime, because it can be changed into another prime (148978553) 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, 74489256 + 74489257.

It is an arithmetic number, because the mean of its divisors is an integer number (74489257).

Almost surely, 2^148978513 is an apocalyptic number.

It is an amenable number.

148978513 is a deficient number, since it is larger than the sum of its proper divisors (1).

148978513 is an equidigital number, since it uses as much as digits as its factorization.

148978513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 148978513 is about 12205.6754421867. The cubic root of 148978513 is about 530.1204342426.

The spelling of 148978513 in words is "one hundred forty-eight million, nine hundred seventy-eight thousand, five hundred thirteen".