1611492949 has 4 divisors (see below), whose sum is σ = 1757992320. Its totient is φ = 1464993580.

The previous prime is 1611492889. The next prime is 1611492977. The reversal of 1611492949 is 9492941161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9492941161 = 11 ⋅862994651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611492949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1611492899 and 1611492908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611492979) 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, 73249669 + ... + 73249690.

It is an arithmetic number, because the mean of its divisors is an integer number (439498080).

Almost surely, 2^1611492949 is an apocalyptic number.

It is an amenable number.

1611492949 is a deficient number, since it is larger than the sum of its proper divisors (146499371).

1611492949 is a wasteful number, since it uses less digits than its factorization.

1611492949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146499370.

The product of its digits is 139968, while the sum is 46.

The square root of 1611492949 is about 40143.4048007889. The cubic root of 1611492949 is about 1172.4008821428.

The spelling of 1611492949 in words is "one billion, six hundred eleven million, four hundred ninety-two thousand, nine hundred forty-nine".