139620345 has 16 divisors (see below), whose sum is σ = 225697920. Its totient is φ = 73695744.

The previous prime is 139620331. The next prime is 139620347. The reversal of 139620345 is 543026931.

It is not a de Polignac number, because 139620345 - 2⁴ = 139620329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139620347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46525 + ... + 49434.

It is an arithmetic number, because the mean of its divisors is an integer number (14106120).

Almost surely, 2^139620345 is an apocalyptic number.

139620345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139620345 is a deficient number, since it is larger than the sum of its proper divisors (86077575).

139620345 is an equidigital number, since it uses as much as digits as its factorization.

139620345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96064.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 139620345 is about 11816.1053228211. The cubic root of 139620345 is about 518.7796147026.

The spelling of 139620345 in words is "one hundred thirty-nine million, six hundred twenty thousand, three hundred forty-five".