139379550 has 24 divisors (see below), whose sum is σ = 345661656. Its totient is φ = 37167840.

The previous prime is 139379533. The next prime is 139379551. The reversal of 139379550 is 55973931.

It is a happy number.

139379550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139379551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464449 + ... + 464748.

It is an arithmetic number, because the mean of its divisors is an integer number (14402569).

Almost surely, 2^139379550 is an apocalyptic number.

139379550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139379550 is an abundant number, since it is smaller than the sum of its proper divisors (206282106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139379550 is a wasteful number, since it uses less digits than its factorization.

139379550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929212 (or 929207 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 42.

The square root of 139379550 is about 11805.9116547601. The cubic root of 139379550 is about 518.4812068547.

The spelling of 139379550 in words is "one hundred thirty-nine million, three hundred seventy-nine thousand, five hundred fifty".