90890407 has 2 divisors, whose sum is σ = 90890408. Its totient is φ = 90890406.

The previous prime is 90890383. The next prime is 90890453. The reversal of 90890407 is 70409809.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (70409809) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90890407 is a prime.

It is a super-2 number, since 2×90890407² = 16522132169251298, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5265667 and since 90890407 and 5265667 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90890467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45445203 + 45445204.

It is an arithmetic number, because the mean of its divisors is an integer number (45445204).

Almost surely, 2^90890407 is an apocalyptic number.

90890407 is a deficient number, since it is larger than the sum of its proper divisors (1).

90890407 is an equidigital number, since it uses as much as digits as its factorization.

90890407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 90890407 is about 9533.6460496496. The cubic root of 90890407 is about 449.6135068293.

The spelling of 90890407 in words is "ninety million, eight hundred ninety thousand, four hundred seven".