137421469 has 2 divisors, whose sum is σ = 137421470. Its totient is φ = 137421468.

The previous prime is 137421457. The next prime is 137421499. The reversal of 137421469 is 964124731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117440569 + 19980900 = 10837^2 + 4470^2 .

It is an emirp because it is prime and its reverse (964124731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137421469 - 2⁵ = 137421437 is a prime.

It is a super-2 number, since 2×137421469² = 37769320284235922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137421409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68710734 + 68710735.

It is an arithmetic number, because the mean of its divisors is an integer number (68710735).

Almost surely, 2^137421469 is an apocalyptic number.

It is an amenable number.

137421469 is a deficient number, since it is larger than the sum of its proper divisors (1).

137421469 is an equidigital number, since it uses as much as digits as its factorization.

137421469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 137421469 is about 11722.6903482093. The cubic root of 137421469 is about 516.0417772096.

The spelling of 137421469 in words is "one hundred thirty-seven million, four hundred twenty-one thousand, four hundred sixty-nine".