90437617 has 4 divisors (see below), whose sum is σ = 91453860. Its totient is φ = 89421376.

The previous prime is 90437609. The next prime is 90437621. The reversal of 90437617 is 71673409.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5779216 + 84658401 = 2404^2 + 9201^2 .

It is a cyclic number.

It is not a de Polignac number, because 90437617 - 2³ = 90437609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90437647) 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, 507988 + ... + 508165.

It is an arithmetic number, because the mean of its divisors is an integer number (22863465).

Almost surely, 2^90437617 is an apocalyptic number.

It is an amenable number.

90437617 is a deficient number, since it is larger than the sum of its proper divisors (1016243).

90437617 is a wasteful number, since it uses less digits than its factorization.

90437617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016242.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 90437617 is about 9509.8694523111. The cubic root of 90437617 is about 448.8656482996.

The spelling of 90437617 in words is "ninety million, four hundred thirty-seven thousand, six hundred seventeen".