139780045 has 8 divisors (see below), whose sum is σ = 168310296. Its totient is φ = 111441216.

The previous prime is 139780037. The next prime is 139780049. The reversal of 139780045 is 540087931.

It can be written as a sum of positive squares in 4 ways, for example, as 25140196 + 114639849 = 5014^2 + 10707^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139780045 - 2³ = 139780037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139779986 and 139780013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139780049) 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, 46242 + ... + 49171.

It is an arithmetic number, because the mean of its divisors is an integer number (21038787).

Almost surely, 2^139780045 is an apocalyptic number.

It is an amenable number.

139780045 is a deficient number, since it is larger than the sum of its proper divisors (28530251).

139780045 is an equidigital number, since it uses as much as digits as its factorization.

139780045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95711.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 139780045 is about 11822.8611173438. The cubic root of 139780045 is about 518.9773354967.

The spelling of 139780045 in words is "one hundred thirty-nine million, seven hundred eighty thousand, forty-five".