139814473 has 2 divisors, whose sum is σ = 139814474. Its totient is φ = 139814472.

The previous prime is 139814471. The next prime is 139814509. The reversal of 139814473 is 374418931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123387664 + 16426809 = 11108^2 + 4053^2 .

It is a cyclic number.

It is not a de Polignac number, because 139814473 - 2¹ = 139814471 is a prime.

Together with 139814471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (139814471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69907236 + 69907237.

It is an arithmetic number, because the mean of its divisors is an integer number (69907237).

Almost surely, 2^139814473 is an apocalyptic number.

It is an amenable number.

139814473 is a deficient number, since it is larger than the sum of its proper divisors (1).

139814473 is an equidigital number, since it uses as much as digits as its factorization.

139814473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 139814473 is about 11824.3170204456. The cubic root of 139814473 is about 519.0199402548.

The spelling of 139814473 in words is "one hundred thirty-nine million, eight hundred fourteen thousand, four hundred seventy-three".