139137403 has 2 divisors, whose sum is σ = 139137404. Its totient is φ = 139137402.

The previous prime is 139137347. The next prime is 139137433. The reversal of 139137403 is 304731931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139137403 - 2²¹ = 137040251 is a prime.

It is not a weakly prime, because it can be changed into another prime (139137433) 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, 69568701 + 69568702.

It is an arithmetic number, because the mean of its divisors is an integer number (69568702).

Almost surely, 2^139137403 is an apocalyptic number.

139137403 is a deficient number, since it is larger than the sum of its proper divisors (1).

139137403 is an equidigital number, since it uses as much as digits as its factorization.

139137403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 139137403 is about 11795.6518683793. The cubic root of 139137403 is about 518.1807767339.

It can be divided in two parts, 13913 and 7403, that added together give a square (21316 = 146²).

The spelling of 139137403 in words is "one hundred thirty-nine million, one hundred thirty-seven thousand, four hundred three".