981590249 has 2 divisors, whose sum is σ = 981590250. Its totient is φ = 981590248.

The previous prime is 981590237. The next prime is 981590261. The reversal of 981590249 is 942095189.

It is a balanced prime because it is at equal distance from previous prime (981590237) and next prime (981590261).

It can be written as a sum of positive squares in only one way, i.e., 953574400 + 28015849 = 30880^2 + 5293^2 .

It is a cyclic number.

It is not a de Polignac number, because 981590249 - 2⁸ = 981589993 is a prime.

It is not a weakly prime, because it can be changed into another prime (981598249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490795124 + 490795125.

It is an arithmetic number, because the mean of its divisors is an integer number (490795125).

Almost surely, 2^981590249 is an apocalyptic number.

It is an amenable number.

981590249 is a deficient number, since it is larger than the sum of its proper divisors (1).

981590249 is an equidigital number, since it uses as much as digits as its factorization.

981590249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 981590249 is about 31330.3407099253. The cubic root of 981590249 is about 993.8253687335.

The spelling of 981590249 in words is "nine hundred eighty-one million, five hundred ninety thousand, two hundred forty-nine".