90420377 has 2 divisors, whose sum is σ = 90420378. Its totient is φ = 90420376.

The previous prime is 90420371. The next prime is 90420389. The reversal of 90420377 is 77302409.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72914521 + 17505856 = 8539^2 + 4184^2 .

It is an emirp because it is prime and its reverse (77302409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90420377 - 2¹⁰ = 90419353 is a prime.

It is not a weakly prime, because it can be changed into another prime (90420371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45210188 + 45210189.

It is an arithmetic number, because the mean of its divisors is an integer number (45210189).

Almost surely, 2^90420377 is an apocalyptic number.

It is an amenable number.

90420377 is a deficient number, since it is larger than the sum of its proper divisors (1).

90420377 is an equidigital number, since it uses as much as digits as its factorization.

90420377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 90420377 is about 9508.9629823656. The cubic root of 90420377 is about 448.8371242709.

The spelling of 90420377 in words is "ninety million, four hundred twenty thousand, three hundred seventy-seven".