137478911 has 2 divisors, whose sum is σ = 137478912. Its totient is φ = 137478910.

The previous prime is 137478907. The next prime is 137478917. The reversal of 137478911 is 119874731.

It is a weak prime.

It is an emirp because it is prime and its reverse (119874731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137478911 - 2² = 137478907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137478917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68739455 + 68739456.

It is an arithmetic number, because the mean of its divisors is an integer number (68739456).

Almost surely, 2^137478911 is an apocalyptic number.

137478911 is a deficient number, since it is larger than the sum of its proper divisors (1).

137478911 is an equidigital number, since it uses as much as digits as its factorization.

137478911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 137478911 is about 11725.1401270944. The cubic root of 137478911 is about 516.1136687968.

The spelling of 137478911 in words is "one hundred thirty-seven million, four hundred seventy-eight thousand, nine hundred eleven".