139749101623 has 2 divisors, whose sum is σ = 139749101624. Its totient is φ = 139749101622.

The previous prime is 139749101581. The next prime is 139749101633. The reversal of 139749101623 is 326101947931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139749101623 - 2⁹ = 139749101111 is a prime.

It is a super-2 number, since 2×139749101623² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139749101633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69874550811 + 69874550812.

It is an arithmetic number, because the mean of its divisors is an integer number (69874550812).

Almost surely, 2^139749101623 is an apocalyptic number.

139749101623 is a deficient number, since it is larger than the sum of its proper divisors (1).

139749101623 is an equidigital number, since it uses as much as digits as its factorization.

139749101623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 139749101623 in words is "one hundred thirty-nine billion, seven hundred forty-nine million, one hundred one thousand, six hundred twenty-three".