90770039 has 2 divisors, whose sum is σ = 90770040. Its totient is φ = 90770038.

The previous prime is 90770027. The next prime is 90770041. The reversal of 90770039 is 93007709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90770039 - 2¹² = 90765943 is a prime.

Together with 90770041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90769990 and 90770008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90770539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45385019 + 45385020.

It is an arithmetic number, because the mean of its divisors is an integer number (45385020).

Almost surely, 2^90770039 is an apocalyptic number.

90770039 is a deficient number, since it is larger than the sum of its proper divisors (1).

90770039 is an equidigital number, since it uses as much as digits as its factorization.

90770039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 90770039 is about 9527.3311583045. The cubic root of 90770039 is about 449.4149417358.

Subtracting 90770039 from its reverse (93007709), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 90770039 in words is "ninety million, seven hundred seventy thousand, thirty-nine".