9964557 has 6 divisors (see below), whose sum is σ = 14393262. Its totient is φ = 6643032.

The previous prime is 9964501. The next prime is 9964561. The reversal of 9964557 is 7554699.

It is a happy number.

9964557 is a `hidden beast` number, since 9 + 96 + 4 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6702921 + 3261636 = 2589^2 + 1806^2 .

It is not a de Polignac number, because 9964557 - 2⁸ = 9964301 is a prime.

It is a d-powerful number, because it can be written as 9⁷ + 9⁷ + 6⁷ + 4⁵ + 5 + 5 + 7⁶ .

9964557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9964597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553578 + ... + 553595.

It is an arithmetic number, because the mean of its divisors is an integer number (2398877).

Almost surely, 2^9964557 is an apocalyptic number.

It is an amenable number.

9964557 is a deficient number, since it is larger than the sum of its proper divisors (4428705).

9964557 is a wasteful number, since it uses less digits than its factorization.

9964557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107179 (or 1107176 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 9964557 is about 3156.6686554024. The cubic root of 9964557 is about 215.1886356012.

It can be divided in two parts, 99645 and 57, that multiplied together give a palindrome (5679765).

The spelling of 9964557 in words is "nine million, nine hundred sixty-four thousand, five hundred fifty-seven".