1902988361 has 2 divisors, whose sum is σ = 1902988362. Its totient is φ = 1902988360.

The previous prime is 1902988357. The next prime is 1902988387. The reversal of 1902988361 is 1638892091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1447422025 + 455566336 = 38045^2 + 21344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1902988361 - 2² = 1902988357 is a prime.

It is not a weakly prime, because it can be changed into another prime (1902988861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951494180 + 951494181.

It is an arithmetic number, because the mean of its divisors is an integer number (951494181).

Almost surely, 2^1902988361 is an apocalyptic number.

It is an amenable number.

1902988361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1902988361 is an equidigital number, since it uses as much as digits as its factorization.

1902988361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1902988361 is about 43623.2548189610. The cubic root of 1902988361 is about 1239.2113353452.

The spelling of 1902988361 in words is "one billion, nine hundred two million, nine hundred eighty-eight thousand, three hundred sixty-one".