149779423769 has 2 divisors, whose sum is σ = 149779423770. Its totient is φ = 149779423768.

The previous prime is 149779423753. The next prime is 149779423771. The reversal of 149779423769 is 967324977941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149104099600 + 675324169 = 386140^2 + 25987^2 .

It is a cyclic number.

It is not a de Polignac number, because 149779423769 - 2⁴ = 149779423753 is a prime.

It is a super-2 number, since 2×149779423769² (a number of 23 digits) contains 22 as substring.

Together with 149779423771, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 149779423699 and 149779423708.

It is not a weakly prime, because it can be changed into another prime (149779423799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74889711884 + 74889711885.

It is an arithmetic number, because the mean of its divisors is an integer number (74889711885).

Almost surely, 2^149779423769 is an apocalyptic number.

It is an amenable number.

149779423769 is a deficient number, since it is larger than the sum of its proper divisors (1).

149779423769 is an equidigital number, since it uses as much as digits as its factorization.

149779423769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144027072, while the sum is 68.

The spelling of 149779423769 in words is "one hundred forty-nine billion, seven hundred seventy-nine million, four hundred twenty-three thousand, seven hundred sixty-nine".