137455397 has 2 divisors, whose sum is σ = 137455398. Its totient is φ = 137455396.

The previous prime is 137455327. The next prime is 137455441. The reversal of 137455397 is 793554731.

It is an a-pointer prime, because the next prime (137455441) can be obtained adding 137455397 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131928196 + 5527201 = 11486^2 + 2351^2 .

It is an emirp because it is prime and its reverse (793554731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137455397 - 2¹⁴ = 137439013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137455327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68727698 + 68727699.

It is an arithmetic number, because the mean of its divisors is an integer number (68727699).

Almost surely, 2^137455397 is an apocalyptic number.

It is an amenable number.

137455397 is a deficient number, since it is larger than the sum of its proper divisors (1).

137455397 is an equidigital number, since it uses as much as digits as its factorization.

137455397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 44.

The square root of 137455397 is about 11724.1373669878. The cubic root of 137455397 is about 516.0842422501.

The spelling of 137455397 in words is "one hundred thirty-seven million, four hundred fifty-five thousand, three hundred ninety-seven".