137431471 has 2 divisors, whose sum is σ = 137431472. Its totient is φ = 137431470.

The previous prime is 137431433. The next prime is 137431487. The reversal of 137431471 is 174134731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137431471 - 2¹¹ = 137429423 is a prime.

It is a super-3 number, since 3×137431471³ (a number of 25 digits) contains 333 as substring.

It is equal to p_7775230 and since 137431471 and 7775230 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137431421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68715735 + 68715736.

It is an arithmetic number, because the mean of its divisors is an integer number (68715736).

Almost surely, 2^137431471 is an apocalyptic number.

137431471 is a deficient number, since it is larger than the sum of its proper divisors (1).

137431471 is an equidigital number, since it uses as much as digits as its factorization.

137431471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 137431471 is about 11723.1169490029. The cubic root of 137431471 is about 516.0542966620.

The spelling of 137431471 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, four hundred seventy-one".