137658091 has 2 divisors, whose sum is σ = 137658092. Its totient is φ = 137658090.

The previous prime is 137658049. The next prime is 137658107. The reversal of 137658091 is 190856731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137658091 is a prime.

It is not a weakly prime, because it can be changed into another prime (137658491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68829045 + 68829046.

It is an arithmetic number, because the mean of its divisors is an integer number (68829046).

Almost surely, 2^137658091 is an apocalyptic number.

137658091 is a deficient number, since it is larger than the sum of its proper divisors (1).

137658091 is an equidigital number, since it uses as much as digits as its factorization.

137658091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 137658091 is about 11732.7784859342. The cubic root of 137658091 is about 516.3377931116.

The spelling of 137658091 in words is "one hundred thirty-seven million, six hundred fifty-eight thousand, ninety-one".