137200991 has 2 divisors, whose sum is σ = 137200992. Its totient is φ = 137200990.

The previous prime is 137200939. The next prime is 137200993. The reversal of 137200991 is 199002731.

It is a happy number.

137200991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137200991 - 2¹⁸ = 136938847 is a prime.

It is a super-2 number, since 2×137200991² = 37648223862764162, which contains 22 as substring.

Together with 137200993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137200993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68600495 + 68600496.

It is an arithmetic number, because the mean of its divisors is an integer number (68600496).

Almost surely, 2^137200991 is an apocalyptic number.

137200991 is a deficient number, since it is larger than the sum of its proper divisors (1).

137200991 is an equidigital number, since it uses as much as digits as its factorization.

137200991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 137200991 is about 11713.2826739561. The cubic root of 137200991 is about 515.7656516010.

The spelling of 137200991 in words is "one hundred thirty-seven million, two hundred thousand, nine hundred ninety-one".