993557153 has 2 divisors, whose sum is σ = 993557154. Its totient is φ = 993557152.

The previous prime is 993557077. The next prime is 993557179. The reversal of 993557153 is 351755399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797893009 + 195664144 = 28247^2 + 13988^2 .

It is a cyclic number.

It is not a de Polignac number, because 993557153 - 2¹⁶ = 993491617 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 993557098 and 993557107.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496778576 + 496778577.

It is an arithmetic number, because the mean of its divisors is an integer number (496778577).

Almost surely, 2^993557153 is an apocalyptic number.

It is an amenable number.

993557153 is a deficient number, since it is larger than the sum of its proper divisors (1).

993557153 is an equidigital number, since it uses as much as digits as its factorization.

993557153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 637875, while the sum is 47.

The square root of 993557153 is about 31520.7416315035. The cubic root of 993557153 is about 997.8477555001.

The spelling of 993557153 in words is "nine hundred ninety-three million, five hundred fifty-seven thousand, one hundred fifty-three".