981430157 has 2 divisors, whose sum is σ = 981430158. Its totient is φ = 981430156.

The previous prime is 981430127. The next prime is 981430169. The reversal of 981430157 is 751034189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 919666276 + 61763881 = 30326^2 + 7859^2 .

It is an emirp because it is prime and its reverse (751034189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981430157 - 2⁸ = 981429901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981430157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981430117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490715078 + 490715079.

It is an arithmetic number, because the mean of its divisors is an integer number (490715079).

Almost surely, 2^981430157 is an apocalyptic number.

It is an amenable number.

981430157 is a deficient number, since it is larger than the sum of its proper divisors (1).

981430157 is an equidigital number, since it uses as much as digits as its factorization.

981430157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 981430157 is about 31327.7857021526. The cubic root of 981430157 is about 993.7713366356.

The spelling of 981430157 in words is "nine hundred eighty-one million, four hundred thirty thousand, one hundred fifty-seven".