137431469 has 4 divisors (see below), whose sum is σ = 157064544. Its totient is φ = 117798396.

The previous prime is 137431433. The next prime is 137431471. The reversal of 137431469 is 964134731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137431469 is a prime.

It is a super-2 number, since 2×137431469² = 37774817342995922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137431409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9816527 + ... + 9816540.

It is an arithmetic number, because the mean of its divisors is an integer number (39266136).

Almost surely, 2^137431469 is an apocalyptic number.

It is an amenable number.

137431469 is a deficient number, since it is larger than the sum of its proper divisors (19633075).

137431469 is an equidigital number, since it uses as much as digits as its factorization.

137431469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19633074.

The product of its digits is 54432, while the sum is 38.

The square root of 137431469 is about 11723.1168637014. The cubic root of 137431469 is about 516.0542941587.

The spelling of 137431469 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, four hundred sixty-nine".