90873031 has 2 divisors, whose sum is σ = 90873032. Its totient is φ = 90873030.

The previous prime is 90873019. The next prime is 90873077. The reversal of 90873031 is 13037809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90873031 - 2⁹ = 90872519 is a prime.

It is a super-2 number, since 2×90873031² = 16515815526253922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90872984 and 90873002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90873631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45436515 + 45436516.

It is an arithmetic number, because the mean of its divisors is an integer number (45436516).

Almost surely, 2^90873031 is an apocalyptic number.

90873031 is a deficient number, since it is larger than the sum of its proper divisors (1).

90873031 is an equidigital number, since it uses as much as digits as its factorization.

90873031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 90873031 is about 9532.7347073125. The cubic root of 90873031 is about 449.5848533390.

The spelling of 90873031 in words is "ninety million, eight hundred seventy-three thousand, thirty-one".