137645461 has 2 divisors, whose sum is σ = 137645462. Its totient is φ = 137645460.

The previous prime is 137645441. The next prime is 137645479. The reversal of 137645461 is 164546731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132940900 + 4704561 = 11530^2 + 2169^2 .

It is an emirp because it is prime and its reverse (164546731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137645461 - 2⁵ = 137645429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137645461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137645411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68822730 + 68822731.

It is an arithmetic number, because the mean of its divisors is an integer number (68822731).

Almost surely, 2^137645461 is an apocalyptic number.

It is an amenable number.

137645461 is a deficient number, since it is larger than the sum of its proper divisors (1).

137645461 is an equidigital number, since it uses as much as digits as its factorization.

137645461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 137645461 is about 11732.2402379085. The cubic root of 137645461 is about 516.3220014602.

The spelling of 137645461 in words is "one hundred thirty-seven million, six hundred forty-five thousand, four hundred sixty-one".