989472557 has 8 divisors (see below), whose sum is σ = 1066954560. Its totient is φ = 914531040.

The previous prime is 989472553. The next prime is 989472559. The reversal of 989472557 is 755274989.

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 989472557 - 2² = 989472553 is a prime.

It is a super-2 number, since 2×989472557² = 1958111882112236498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989472553) 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, 634313 + ... + 635870.

It is an arithmetic number, because the mean of its divisors is an integer number (133369320).

Almost surely, 2^989472557 is an apocalyptic number.

It is an amenable number.

989472557 is a deficient number, since it is larger than the sum of its proper divisors (77482003).

989472557 is a wasteful number, since it uses less digits than its factorization.

989472557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270243.

The product of its digits is 6350400, while the sum is 56.

The square root of 989472557 is about 31455.8827089624. The cubic root of 989472557 is about 996.4784656865.

The spelling of 989472557 in words is "nine hundred eighty-nine million, four hundred seventy-two thousand, five hundred fifty-seven".