139021299 has 8 divisors (see below), whose sum is σ = 205957520. Its totient is φ = 92680848.

The previous prime is 139021237. The next prime is 139021307. The reversal of 139021299 is 992120931.

It is a happy number.

139021299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139021299 - 2⁷ = 139021171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139021999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2574442 + ... + 2574495.

It is an arithmetic number, because the mean of its divisors is an integer number (25744690).

Almost surely, 2^139021299 is an apocalyptic number.

139021299 is a deficient number, since it is larger than the sum of its proper divisors (66936221).

139021299 is an equidigital number, since it uses as much as digits as its factorization.

139021299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148946 (or 5148940 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 139021299 is about 11790.7293667525. The cubic root of 139021299 is about 518.0366036556.

The spelling of 139021299 in words is "one hundred thirty-nine million, twenty-one thousand, two hundred ninety-nine".