139810747 has 2 divisors, whose sum is σ = 139810748. Its totient is φ = 139810746.

The previous prime is 139810717. The next prime is 139810751. The reversal of 139810747 is 747018931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139810747 is a prime.

It is not a weakly prime, because it can be changed into another prime (139810717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69905373 + 69905374.

It is an arithmetic number, because the mean of its divisors is an integer number (69905374).

Almost surely, 2^139810747 is an apocalyptic number.

139810747 is a deficient number, since it is larger than the sum of its proper divisors (1).

139810747 is an equidigital number, since it uses as much as digits as its factorization.

139810747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 139810747 is about 11824.1594627271. The cubic root of 139810747 is about 519.0153296556.

The spelling of 139810747 in words is "one hundred thirty-nine million, eight hundred ten thousand, seven hundred forty-seven".