90120319 has 2 divisors, whose sum is σ = 90120320. Its totient is φ = 90120318.

The previous prime is 90120301. The next prime is 90120323. The reversal of 90120319 is 91302109.

It is a strong prime.

It is an emirp because it is prime and its reverse (91302109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90120319 - 2⁹ = 90119807 is a prime.

It is a super-2 number, since 2×90120319² = 16243343793323522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90120293 and 90120302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90120619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45060159 + 45060160.

It is an arithmetic number, because the mean of its divisors is an integer number (45060160).

Almost surely, 2^90120319 is an apocalyptic number.

90120319 is a deficient number, since it is larger than the sum of its proper divisors (1).

90120319 is an equidigital number, since it uses as much as digits as its factorization.

90120319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 90120319 is about 9493.1722306087. The cubic root of 90120319 is about 448.3400887429.

It can be divided in two parts, 90 and 120319, that added together give a square (120409 = 347²).

The spelling of 90120319 in words is "ninety million, one hundred twenty thousand, three hundred nineteen".