1331692090 has 8 divisors (see below), whose sum is σ = 2397045780. Its totient is φ = 532676832.

The previous prime is 1331692081. The next prime is 1331692091. The reversal of 1331692090 is 902961331.

It can be written as a sum of positive squares in 2 ways, for example, as 1251249129 + 80442961 = 35373^2 + 8969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1331692091) 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, 66584595 + ... + 66584614.

Almost surely, 2^1331692090 is an apocalyptic number.

1331692090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331692090 is a deficient number, since it is larger than the sum of its proper divisors (1065353690).

1331692090 is a wasteful number, since it uses less digits than its factorization.

1331692090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133169216.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1331692090 is about 36492.3565969642. The cubic root of 1331692090 is about 1100.1906253657.

The spelling of 1331692090 in words is "one billion, three hundred thirty-one million, six hundred ninety-two thousand, ninety".