1192389961 has 9 divisors (see below), whose sum is σ = 1387347111. Its totient is φ = 1021841352.

The previous prime is 1192389959. The next prime is 1192389971. The reversal of 1192389961 is 1699832911.

The square root of 1192389961 is 34531.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 371911225 + 820478736 = 19285^2 + 28644^2 .

It is not a de Polignac number, because 1192389961 - 2¹ = 1192389959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1192389901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 239251 + ... + 244183.

It is an arithmetic number, because the mean of its divisors is an integer number (154149679).

Almost surely, 2^1192389961 is an apocalyptic number.

1192389961 is the 34531-st square number.

1192389961 is the 17266-th centered octagonal number.

It is an amenable number.

1192389961 is a deficient number, since it is larger than the sum of its proper divisors (194957150).

1192389961 is an frugal number, since it uses more digits than its factorization.

1192389961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880 (or 4940 counting only the distinct ones).

The product of its digits is 209952, while the sum is 49.

The cubic root of 1192389961 is about 1060.4074501610.

Multiplying 1192389961 by its sum of digits (49), we get a square (58427108089 = 241717²).

1192389961 divided by its sum of digits (49) gives a square (24334489 = 4933²).

The spelling of 1192389961 in words is "one billion, one hundred ninety-two million, three hundred eighty-nine thousand, nine hundred sixty-one".