139779423 has 24 divisors (see below), whose sum is σ = 244322208. Its totient is φ = 75174912.

The previous prime is 139779421. The next prime is 139779427. The reversal of 139779423 is 324977931.

It is not a de Polignac number, because 139779423 - 2¹ = 139779421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139779421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64186 + ... + 66327.

It is an arithmetic number, because the mean of its divisors is an integer number (10180092).

Almost surely, 2^139779423 is an apocalyptic number.

139779423 is a deficient number, since it is larger than the sum of its proper divisors (104542785).

139779423 is a wasteful number, since it uses less digits than its factorization.

139779423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130543 (or 130540 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 139779423 is about 11822.8348123451. The cubic root of 139779423 is about 518.9765657055.

The spelling of 139779423 in words is "one hundred thirty-nine million, seven hundred seventy-nine thousand, four hundred twenty-three".