139929530 has 16 divisors (see below), whose sum is σ = 271248264. Its totient is φ = 51666240.

The previous prime is 139929521. The next prime is 139929551. The reversal of 139929530 is 35929931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 123632161 + 16297369 = 11119^2 + 4037^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538061 + ... + 538320.

Almost surely, 2^139929530 is an apocalyptic number.

139929530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139929530 is a deficient number, since it is larger than the sum of its proper divisors (131318734).

139929530 is a wasteful number, since it uses less digits than its factorization.

139929530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076401.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 139929530 is about 11829.1812903514. The cubic root of 139929530 is about 519.1622729299.

The spelling of 139929530 in words is "one hundred thirty-nine million, nine hundred twenty-nine thousand, five hundred thirty".