64623437 has 8 divisors (see below), whose sum is σ = 67398912. Its totient is φ = 61891200.

The previous prime is 64623431. The next prime is 64623509. The reversal of 64623437 is 73432646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64623437 - 2¹² = 64619341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64623397 and 64623406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64623431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7739 + ... + 13752.

It is an arithmetic number, because the mean of its divisors is an integer number (8424864).

Almost surely, 2^64623437 is an apocalyptic number.

It is an amenable number.

64623437 is a deficient number, since it is larger than the sum of its proper divisors (2775475).

64623437 is a wasteful number, since it uses less digits than its factorization.

64623437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21619.

The product of its digits is 72576, while the sum is 35.

The square root of 64623437 is about 8038.8703808433. The cubic root of 64623437 is about 401.2946323802.

The spelling of 64623437 in words is "sixty-four million, six hundred twenty-three thousand, four hundred thirty-seven".