138952967 has 2 divisors, whose sum is σ = 138952968. Its totient is φ = 138952966.

The previous prime is 138952963. The next prime is 138952969. The reversal of 138952967 is 769259831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138952967 - 2² = 138952963 is a prime.

Together with 138952969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138952963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69476483 + 69476484.

It is an arithmetic number, because the mean of its divisors is an integer number (69476484).

Almost surely, 2^138952967 is an apocalyptic number.

138952967 is a deficient number, since it is larger than the sum of its proper divisors (1).

138952967 is an equidigital number, since it uses as much as digits as its factorization.

138952967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 138952967 is about 11787.8313102962. The cubic root of 138952967 is about 517.9517143167.

The spelling of 138952967 in words is "one hundred thirty-eight million, nine hundred fifty-two thousand, nine hundred sixty-seven".