137778941 has 2 divisors, whose sum is σ = 137778942. Its totient is φ = 137778940.

The previous prime is 137778929. The next prime is 137779079. The reversal of 137778941 is 149877731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 24462916 = 10645^2 + 4946^2 .

It is a cyclic number.

It is not a de Polignac number, because 137778941 - 2²⁶ = 70670077 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137778341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68889470 + 68889471.

It is an arithmetic number, because the mean of its divisors is an integer number (68889471).

Almost surely, 2^137778941 is an apocalyptic number.

It is an amenable number.

137778941 is a deficient number, since it is larger than the sum of its proper divisors (1).

137778941 is an equidigital number, since it uses as much as digits as its factorization.

137778941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 137778941 is about 11737.9274576051. The cubic root of 137778941 is about 516.4888465189.

The spelling of 137778941 in words is "one hundred thirty-seven million, seven hundred seventy-eight thousand, nine hundred forty-one".