139467919 has 2 divisors, whose sum is σ = 139467920. Its totient is φ = 139467918.

The previous prime is 139467901. The next prime is 139467947. The reversal of 139467919 is 919764931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139467919 - 2²⁵ = 105913487 is a prime.

It is a super-2 number, since 2×139467919² = 38902600860381122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139467959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69733959 + 69733960.

It is an arithmetic number, because the mean of its divisors is an integer number (69733960).

Almost surely, 2^139467919 is an apocalyptic number.

139467919 is a deficient number, since it is larger than the sum of its proper divisors (1).

139467919 is an equidigital number, since it uses as much as digits as its factorization.

139467919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 139467919 is about 11809.6536359031. The cubic root of 139467919 is about 518.5907590000.

The spelling of 139467919 in words is "one hundred thirty-nine million, four hundred sixty-seven thousand, nine hundred nineteen".