137213465 has 4 divisors (see below), whose sum is σ = 164656164. Its totient is φ = 109770768.

The previous prime is 137213437. The next prime is 137213507. The reversal of 137213465 is 564312731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564312731 = 12227 ⋅46153.

It can be written as a sum of positive squares in 2 ways, for example, as 64128064 + 73085401 = 8008^2 + 8549^2 .

It is a cyclic number.

It is not a de Polignac number, because 137213465 - 2¹⁶ = 137147929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13721342 + ... + 13721351.

It is an arithmetic number, because the mean of its divisors is an integer number (41164041).

Almost surely, 2^137213465 is an apocalyptic number.

It is an amenable number.

137213465 is a deficient number, since it is larger than the sum of its proper divisors (27442699).

137213465 is an equidigital number, since it uses as much as digits as its factorization.

137213465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27442698.

The product of its digits is 15120, while the sum is 32.

The square root of 137213465 is about 11713.8151342763. The cubic root of 137213465 is about 515.7812818714.

The spelling of 137213465 in words is "one hundred thirty-seven million, two hundred thirteen thousand, four hundred sixty-five".