137638951 has 2 divisors, whose sum is σ = 137638952. Its totient is φ = 137638950.

The previous prime is 137638939. The next prime is 137638981. The reversal of 137638951 is 159836731.

It is a weak prime.

It is an emirp because it is prime and its reverse (159836731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137638951 - 2⁹ = 137638439 is a prime.

It is equal to p_7786384 and since 137638951 and 7786384 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 137638898 and 137638907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137638981) 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, 68819475 + 68819476.

It is an arithmetic number, because the mean of its divisors is an integer number (68819476).

Almost surely, 2^137638951 is an apocalyptic number.

137638951 is a deficient number, since it is larger than the sum of its proper divisors (1).

137638951 is an equidigital number, since it uses as much as digits as its factorization.

137638951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 137638951 is about 11731.9627940085. The cubic root of 137638951 is about 516.3138614430.

The spelling of 137638951 in words is "one hundred thirty-seven million, six hundred thirty-eight thousand, nine hundred fifty-one".