139371073 has 2 divisors, whose sum is σ = 139371074. Its totient is φ = 139371072.

The previous prime is 139370983. The next prime is 139371097. The reversal of 139371073 is 370173931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111365809 + 28005264 = 10553^2 + 5292^2 .

It is an emirp because it is prime and its reverse (370173931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139371073 - 2¹⁷ = 139240001 is a prime.

It is not a weakly prime, because it can be changed into another prime (139371473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69685536 + 69685537.

It is an arithmetic number, because the mean of its divisors is an integer number (69685537).

Almost surely, 2^139371073 is an apocalyptic number.

It is an amenable number.

139371073 is a deficient number, since it is larger than the sum of its proper divisors (1).

139371073 is an equidigital number, since it uses as much as digits as its factorization.

139371073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 34.

The square root of 139371073 is about 11805.5526342480. The cubic root of 139371073 is about 518.4706953789.

The spelling of 139371073 in words is "one hundred thirty-nine million, three hundred seventy-one thousand, seventy-three".