135402437 has 2 divisors, whose sum is σ = 135402438. Its totient is φ = 135402436.

The previous prime is 135402419. The next prime is 135402469. The reversal of 135402437 is 734204531.

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., 133425601 + 1976836 = 11551^2 + 1406^2 .

It is a cyclic number.

It is not a de Polignac number, because 135402437 - 2⁸ = 135402181 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 (135402497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67701218 + 67701219.

It is an arithmetic number, because the mean of its divisors is an integer number (67701219).

Almost surely, 2^135402437 is an apocalyptic number.

It is an amenable number.

135402437 is a deficient number, since it is larger than the sum of its proper divisors (1).

135402437 is an equidigital number, since it uses as much as digits as its factorization.

135402437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 135402437 is about 11636.2552825211. The cubic root of 135402437 is about 513.5020246827.

Adding to 135402437 its reverse (734204531), we get a palindrome (869606968).

The spelling of 135402437 in words is "one hundred thirty-five million, four hundred two thousand, four hundred thirty-seven".