90436761949 has 2 divisors, whose sum is σ = 90436761950. Its totient is φ = 90436761948.

The previous prime is 90436761913. The next prime is 90436762057. The reversal of 90436761949 is 94916763409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77902392100 + 12534369849 = 279110^2 + 111957^2 .

It is a cyclic number.

It is not a de Polignac number, because 90436761949 - 2²¹ = 90434664797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90436761893 and 90436761902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90436764949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45218380974 + 45218380975.

It is an arithmetic number, because the mean of its divisors is an integer number (45218380975).

Almost surely, 2^90436761949 is an apocalyptic number.

It is an amenable number.

90436761949 is a deficient number, since it is larger than the sum of its proper divisors (1).

90436761949 is an equidigital number, since it uses as much as digits as its factorization.

90436761949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 90436761949 in words is "ninety billion, four hundred thirty-six million, seven hundred sixty-one thousand, nine hundred forty-nine".