137961667 has 2 divisors, whose sum is σ = 137961668. Its totient is φ = 137961666.

The previous prime is 137961631. The next prime is 137961683. The reversal of 137961667 is 766169731.

It is a strong prime.

It is an emirp because it is prime and its reverse (766169731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137961667 is a prime.

It is a super-2 number, since 2×137961667² = 38066843122837778, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137961697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68980833 + 68980834.

It is an arithmetic number, because the mean of its divisors is an integer number (68980834).

Almost surely, 2^137961667 is an apocalyptic number.

137961667 is a deficient number, since it is larger than the sum of its proper divisors (1).

137961667 is an equidigital number, since it uses as much as digits as its factorization.

137961667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 137961667 is about 11745.7084503235. The cubic root of 137961667 is about 516.7170726172.

The spelling of 137961667 in words is "one hundred thirty-seven million, nine hundred sixty-one thousand, six hundred sixty-seven".