139321619 has 2 divisors, whose sum is σ = 139321620. Its totient is φ = 139321618.

The previous prime is 139321601. The next prime is 139321639. The reversal of 139321619 is 916123931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139321619 is a prime.

It is a super-2 number, since 2×139321619² = 38821027041562322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139321639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69660809 + 69660810.

It is an arithmetic number, because the mean of its divisors is an integer number (69660810).

Almost surely, 2^139321619 is an apocalyptic number.

139321619 is a deficient number, since it is larger than the sum of its proper divisors (1).

139321619 is an equidigital number, since it uses as much as digits as its factorization.

139321619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 139321619 is about 11803.4579255403. The cubic root of 139321619 is about 518.4093639454.

It can be divided in two parts, 13932 and 1619, that added together give a palindrome (15551).

The spelling of 139321619 in words is "one hundred thirty-nine million, three hundred twenty-one thousand, six hundred nineteen".