139061501 has 2 divisors, whose sum is σ = 139061502. Its totient is φ = 139061500.

The previous prime is 139061471. The next prime is 139061539. The reversal of 139061501 is 105160931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 25745476 = 10645^2 + 5074^2 .

It is a cyclic number.

It is not a de Polignac number, because 139061501 - 2¹⁸ = 138799357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139061201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69530750 + 69530751.

It is an arithmetic number, because the mean of its divisors is an integer number (69530751).

Almost surely, 2^139061501 is an apocalyptic number.

It is an amenable number.

139061501 is a deficient number, since it is larger than the sum of its proper divisors (1).

139061501 is an equidigital number, since it uses as much as digits as its factorization.

139061501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 139061501 is about 11792.4340574794. The cubic root of 139061501 is about 518.0865338954.

The spelling of 139061501 in words is "one hundred thirty-nine million, sixty-one thousand, five hundred one".