146687557 has 2 divisors, whose sum is σ = 146687558. Its totient is φ = 146687556.

The previous prime is 146687551. The next prime is 146687599. The reversal of 146687557 is 755786641.

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., 146676321 + 11236 = 12111^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 146687557 - 2¹⁵ = 146654789 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 146687557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146687551) 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, 73343778 + 73343779.

It is an arithmetic number, because the mean of its divisors is an integer number (73343779).

Almost surely, 2^146687557 is an apocalyptic number.

It is an amenable number.

146687557 is a deficient number, since it is larger than the sum of its proper divisors (1).

146687557 is an equidigital number, since it uses as much as digits as its factorization.

146687557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 49.

The square root of 146687557 is about 12111.4638669320. The cubic root of 146687557 is about 527.3890299126.

The spelling of 146687557 in words is "one hundred forty-six million, six hundred eighty-seven thousand, five hundred fifty-seven".