139952287 has 2 divisors, whose sum is σ = 139952288. Its totient is φ = 139952286.

The previous prime is 139952257. The next prime is 139952297. The reversal of 139952287 is 782259931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139952287 - 2⁷ = 139952159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139952207) 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, 69976143 + 69976144.

It is an arithmetic number, because the mean of its divisors is an integer number (69976144).

Almost surely, 2^139952287 is an apocalyptic number.

139952287 is a deficient number, since it is larger than the sum of its proper divisors (1).

139952287 is an equidigital number, since it uses as much as digits as its factorization.

139952287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 139952287 is about 11830.1431521347. The cubic root of 139952287 is about 519.1904155134.

The spelling of 139952287 in words is "one hundred thirty-nine million, nine hundred fifty-two thousand, two hundred eighty-seven".