981961499 has 2 divisors, whose sum is σ = 981961500. Its totient is φ = 981961498.

The previous prime is 981961493. The next prime is 981961559. The reversal of 981961499 is 994169189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981961499 - 2⁴ = 981961483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981961493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490980749 + 490980750.

It is an arithmetic number, because the mean of its divisors is an integer number (490980750).

Almost surely, 2^981961499 is an apocalyptic number.

981961499 is a deficient number, since it is larger than the sum of its proper divisors (1).

981961499 is an equidigital number, since it uses as much as digits as its factorization.

981961499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 56.

The square root of 981961499 is about 31336.2649178232. The cubic root of 981961499 is about 993.9506454341.

The spelling of 981961499 in words is "nine hundred eighty-one million, nine hundred sixty-one thousand, four hundred ninety-nine".