139051403 has 2 divisors, whose sum is σ = 139051404. Its totient is φ = 139051402.

The previous prime is 139051397. The next prime is 139051417. The reversal of 139051403 is 304150931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139051403 - 2⁴ = 139051387 is a prime.

It is not a weakly prime, because it can be changed into another prime (139051453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69525701 + 69525702.

It is an arithmetic number, because the mean of its divisors is an integer number (69525702).

Almost surely, 2^139051403 is an apocalyptic number.

139051403 is a deficient number, since it is larger than the sum of its proper divisors (1).

139051403 is an equidigital number, since it uses as much as digits as its factorization.

139051403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 139051403 is about 11792.0058938249. The cubic root of 139051403 is about 518.0739932463.

The spelling of 139051403 in words is "one hundred thirty-nine million, fifty-one thousand, four hundred three".