137147531 has 2 divisors, whose sum is σ = 137147532. Its totient is φ = 137147530.

The previous prime is 137147513. The next prime is 137147561. The reversal of 137147531 is 135741731.

Together with previous prime (137147513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (135741731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137147531 - 2¹⁴ = 137131147 is a prime.

It is a super-2 number, since 2×137147531² = 37618890518791922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137147561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68573765 + 68573766.

It is an arithmetic number, because the mean of its divisors is an integer number (68573766).

Almost surely, 2^137147531 is an apocalyptic number.

137147531 is a deficient number, since it is larger than the sum of its proper divisors (1).

137147531 is an equidigital number, since it uses as much as digits as its factorization.

137147531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 137147531 is about 11711.0004269490. Note that the first 3 decimals coincide. The cubic root of 137147531 is about 515.6986539951.

The spelling of 137147531 in words is "one hundred thirty-seven million, one hundred forty-seven thousand, five hundred thirty-one".