139252073 has 2 divisors, whose sum is σ = 139252074. Its totient is φ = 139252072.

The previous prime is 139252037. The next prime is 139252123. The reversal of 139252073 is 370252931.

Together with previous prime (139252037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72454144 + 66797929 = 8512^2 + 8173^2 .

It is a cyclic number.

It is not a de Polignac number, because 139252073 - 2¹⁴ = 139235689 is a prime.

It is a super-2 number, since 2×139252073² = 38782279669594658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139252973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69626036 + 69626037.

It is an arithmetic number, because the mean of its divisors is an integer number (69626037).

Almost surely, 2^139252073 is an apocalyptic number.

It is an amenable number.

139252073 is a deficient number, since it is larger than the sum of its proper divisors (1).

139252073 is an equidigital number, since it uses as much as digits as its factorization.

139252073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 139252073 is about 11800.5115567080. The cubic root of 139252073 is about 518.3230904283.

The spelling of 139252073 in words is "one hundred thirty-nine million, two hundred fifty-two thousand, seventy-three".