1195321990 has 16 divisors (see below), whose sum is σ = 2152527552. Its totient is φ = 477918144.

The previous prime is 1195321973. The next prime is 1195321997. The reversal of 1195321990 is 991235911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1195321997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374 + ... + 48913.

It is an arithmetic number, because the mean of its divisors is an integer number (134532972).

Almost surely, 2^1195321990 is an apocalyptic number.

1195321990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1195321990 is a deficient number, since it is larger than the sum of its proper divisors (957205562).

1195321990 is a wasteful number, since it uses less digits than its factorization.

1195321990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52671.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1195321990 is about 34573.4289592456. The cubic root of 1195321990 is about 1061.2759021944.

The spelling of 1195321990 in words is "one billion, one hundred ninety-five million, three hundred twenty-one thousand, nine hundred ninety".