139094587 has 2 divisors, whose sum is σ = 139094588. Its totient is φ = 139094586.

The previous prime is 139094537. The next prime is 139094617. The reversal of 139094587 is 785490931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139094587 is a prime.

It is not a weakly prime, because it can be changed into another prime (139094537) 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, 69547293 + 69547294.

It is an arithmetic number, because the mean of its divisors is an integer number (69547294).

Almost surely, 2^139094587 is an apocalyptic number.

139094587 is a deficient number, since it is larger than the sum of its proper divisors (1).

139094587 is an equidigital number, since it uses as much as digits as its factorization.

139094587 is an odious number, because the sum of its binary digits is odd.

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

The square root of 139094587 is about 11793.8368226799. The cubic root of 139094587 is about 518.1276189589.

It can be divided in two parts, 13909 and 4587, that added together give a square (18496 = 136²).

The spelling of 139094587 in words is "one hundred thirty-nine million, ninety-four thousand, five hundred eighty-seven".