90415379 has 2 divisors, whose sum is σ = 90415380. Its totient is φ = 90415378.

The previous prime is 90415343. The next prime is 90415393. The reversal of 90415379 is 97351409.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (97351409) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90415379 is a prime.

It is not a weakly prime, because it can be changed into another prime (90415079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45207689 + 45207690.

It is an arithmetic number, because the mean of its divisors is an integer number (45207690).

Almost surely, 2^90415379 is an apocalyptic number.

90415379 is a deficient number, since it is larger than the sum of its proper divisors (1).

90415379 is an equidigital number, since it uses as much as digits as its factorization.

90415379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 90415379 is about 9508.7001740511. The cubic root of 90415379 is about 448.8288542719.

The spelling of 90415379 in words is "ninety million, four hundred fifteen thousand, three hundred seventy-nine".