1553488949 has 4 divisors (see below), whose sum is σ = 1559678400. Its totient is φ = 1547299500.

The previous prime is 1553488933. The next prime is 1553488987. The reversal of 1553488949 is 9498843551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1553488949 - 2⁴ = 1553488933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1553488894 and 1553488903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553488249) 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, 3094349 + ... + 3094850.

It is an arithmetic number, because the mean of its divisors is an integer number (389919600).

Almost surely, 2^1553488949 is an apocalyptic number.

It is an amenable number.

1553488949 is a deficient number, since it is larger than the sum of its proper divisors (6189451).

1553488949 is an equidigital number, since it uses as much as digits as its factorization.

1553488949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6189450.

The product of its digits is 6220800, while the sum is 56.

The square root of 1553488949 is about 39414.3241601324. The cubic root of 1553488949 is about 1158.1622080806.

The spelling of 1553488949 in words is "one billion, five hundred fifty-three million, four hundred eighty-eight thousand, nine hundred forty-nine".