1122947661 has 16 divisors (see below), whose sum is σ = 1633955328. Its totient is φ = 680334000.

The previous prime is 1122947659. The next prime is 1122947663. The reversal of 1122947661 is 1667492211.

1122947661 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1122947659) and next prime (1122947663).

It is not a de Polignac number, because 1122947661 - 2¹ = 1122947659 is a prime.

It is a super-2 number, since 2×1122947661² = 2522022898690741842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122947663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146986 + ... + 154436.

It is an arithmetic number, because the mean of its divisors is an integer number (102122208).

Almost surely, 2^1122947661 is an apocalyptic number.

1122947661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122947661 is a deficient number, since it is larger than the sum of its proper divisors (511007667).

1122947661 is a wasteful number, since it uses less digits than its factorization.

1122947661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12032.

The product of its digits is 36288, while the sum is 39.

The square root of 1122947661 is about 33510.4112329288. The cubic root of 1122947661 is about 1039.4090765940.

The spelling of 1122947661 in words is "one billion, one hundred twenty-two million, nine hundred forty-seven thousand, six hundred sixty-one".