537664417 has 4 divisors (see below), whose sum is σ = 540393876. Its totient is φ = 534934960.

The previous prime is 537664381. The next prime is 537664453. The reversal of 537664417 is 714466735.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (537664381) and next prime (537664453).

It can be written as a sum of positive squares in 2 ways, for example, as 508547601 + 29116816 = 22551^2 + 5396^2 .

It is a cyclic number.

It is not a de Polignac number, because 537664417 - 2²³ = 529275809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537664487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364434 + ... + 1364827.

It is an arithmetic number, because the mean of its divisors is an integer number (135098469).

Almost surely, 2^537664417 is an apocalyptic number.

It is an amenable number.

537664417 is a deficient number, since it is larger than the sum of its proper divisors (2729459).

537664417 is a wasteful number, since it uses less digits than its factorization.

537664417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729458.

The product of its digits is 423360, while the sum is 43.

The square root of 537664417 is about 23187.5918758288. The cubic root of 537664417 is about 813.1495609426.

The spelling of 537664417 in words is "five hundred thirty-seven million, six hundred sixty-four thousand, four hundred seventeen".