285940537 has 2 divisors, whose sum is σ = 285940538. Its totient is φ = 285940536.

The previous prime is 285940517. The next prime is 285940547. The reversal of 285940537 is 735049582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176863401 + 109077136 = 13299^2 + 10444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285940537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285940493 and 285940502.

It is not a weakly prime, because it can be changed into another prime (285940517) 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, 142970268 + 142970269.

It is an arithmetic number, because the mean of its divisors is an integer number (142970269).

Almost surely, 2^285940537 is an apocalyptic number.

It is an amenable number.

285940537 is a deficient number, since it is larger than the sum of its proper divisors (1).

285940537 is an equidigital number, since it uses as much as digits as its factorization.

285940537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 285940537 is about 16909.7763734474. The cubic root of 285940537 is about 658.8075629948.

The spelling of 285940537 in words is "two hundred eighty-five million, nine hundred forty thousand, five hundred thirty-seven".