139170379 has 2 divisors, whose sum is σ = 139170380. Its totient is φ = 139170378.

The previous prime is 139170301. The next prime is 139170397. The reversal of 139170379 is 973071931.

It is a happy number.

Together with next prime (139170397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139170379 - 2¹⁹ = 138646091 is a prime.

It is equal to p_7867840 and since 139170379 and 7867840 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (139170179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69585189 + 69585190.

It is an arithmetic number, because the mean of its divisors is an integer number (69585190).

Almost surely, 2^139170379 is an apocalyptic number.

139170379 is a deficient number, since it is larger than the sum of its proper divisors (1).

139170379 is an equidigital number, since it uses as much as digits as its factorization.

139170379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 40.

The square root of 139170379 is about 11797.0495887743. The cubic root of 139170379 is about 518.2217103222.

The spelling of 139170379 in words is "one hundred thirty-nine million, one hundred seventy thousand, three hundred seventy-nine".