139814537 has 2 divisors, whose sum is σ = 139814538. Its totient is φ = 139814536.

The previous prime is 139814531. The next prime is 139814593. The reversal of 139814537 is 735418931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115004176 + 24810361 = 10724^2 + 4981^2 .

It is a cyclic number.

It is not a de Polignac number, because 139814537 - 2⁶ = 139814473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139814494 and 139814503.

It is not a weakly prime, because it can be changed into another prime (139814531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69907268 + 69907269.

It is an arithmetic number, because the mean of its divisors is an integer number (69907269).

Almost surely, 2^139814537 is an apocalyptic number.

It is an amenable number.

139814537 is a deficient number, since it is larger than the sum of its proper divisors (1).

139814537 is an equidigital number, since it uses as much as digits as its factorization.

139814537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 139814537 is about 11824.3197267327. The cubic root of 139814537 is about 519.0200194485.

The spelling of 139814537 in words is "one hundred thirty-nine million, eight hundred fourteen thousand, five hundred thirty-seven".