139677641 has 2 divisors, whose sum is σ = 139677642. Its totient is φ = 139677640.

The previous prime is 139677619. The next prime is 139677667. The reversal of 139677641 is 146776931.

139677641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108764041 + 30913600 = 10429^2 + 5560^2 .

It is a cyclic number.

It is not a de Polignac number, because 139677641 - 2¹⁴ = 139661257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139677592 and 139677601.

It is not a weakly prime, because it can be changed into another prime (139677541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69838820 + 69838821.

It is an arithmetic number, because the mean of its divisors is an integer number (69838821).

Almost surely, 2^139677641 is an apocalyptic number.

It is an amenable number.

139677641 is a deficient number, since it is larger than the sum of its proper divisors (1).

139677641 is an equidigital number, since it uses as much as digits as its factorization.

139677641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 139677641 is about 11818.5295616671. The cubic root of 139677641 is about 518.8505688599.

The spelling of 139677641 in words is "one hundred thirty-nine million, six hundred seventy-seven thousand, six hundred forty-one".