139094537 has 2 divisors, whose sum is σ = 139094538. Its totient is φ = 139094536.

The previous prime is 139094531. The next prime is 139094587. The reversal of 139094537 is 735490931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132963961 + 6130576 = 11531^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 139094537 - 2⁸ = 139094281 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139094494 and 139094503.

It is not a weakly prime, because it can be changed into another prime (139094531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69547268 + 69547269.

It is an arithmetic number, because the mean of its divisors is an integer number (69547269).

Almost surely, 2^139094537 is an apocalyptic number.

It is an amenable number.

139094537 is a deficient number, since it is larger than the sum of its proper divisors (1).

139094537 is an equidigital number, since it uses as much as digits as its factorization.

139094537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 139094537 is about 11793.8347029285. The cubic root of 139094537 is about 518.1275568755.

The spelling of 139094537 in words is "one hundred thirty-nine million, ninety-four thousand, five hundred thirty-seven".