139669770 has 16 divisors (see below), whose sum is σ = 335207520. Its totient is φ = 37245264.

The previous prime is 139669729. The next prime is 139669781. The reversal of 139669770 is 77966931.

139669770 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 2327800 + ... + 2327859.

It is an arithmetic number, because the mean of its divisors is an integer number (20950470).

Almost surely, 2^139669770 is an apocalyptic number.

139669770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139669770 is an abundant number, since it is smaller than the sum of its proper divisors (195537750).

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

139669770 is a wasteful number, since it uses less digits than its factorization.

139669770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655669.

The product of its (nonzero) digits is 428652, while the sum is 48.

The square root of 139669770 is about 11818.1965629279. The cubic root of 139669770 is about 518.8408227295.

The spelling of 139669770 in words is "one hundred thirty-nine million, six hundred sixty-nine thousand, seven hundred seventy".