981554429 has 2 divisors, whose sum is σ = 981554430. Its totient is φ = 981554428.

The previous prime is 981554419. The next prime is 981554437. The reversal of 981554429 is 924455189.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936972100 + 44582329 = 30610^2 + 6677^2 .

It is a cyclic number.

It is not a de Polignac number, because 981554429 - 2²⁰ = 980505853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981554419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490777214 + 490777215.

It is an arithmetic number, because the mean of its divisors is an integer number (490777215).

Almost surely, 2^981554429 is an apocalyptic number.

It is an amenable number.

981554429 is a deficient number, since it is larger than the sum of its proper divisors (1).

981554429 is an equidigital number, since it uses as much as digits as its factorization.

981554429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The square root of 981554429 is about 31329.7690543674. The cubic root of 981554429 is about 993.8132797593.

The spelling of 981554429 in words is "nine hundred eighty-one million, five hundred fifty-four thousand, four hundred twenty-nine".