90703031 has 2 divisors, whose sum is σ = 90703032. Its totient is φ = 90703030.

The previous prime is 90703027. The next prime is 90703033. The reversal of 90703031 is 13030709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90703031 - 2² = 90703027 is a prime.

It is a super-2 number, since 2×90703031² = 16454079665173922, which contains 22 as substring.

Together with 90703033, 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 = 90702988 and 90703006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90703033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45351515 + 45351516.

It is an arithmetic number, because the mean of its divisors is an integer number (45351516).

Almost surely, 2^90703031 is an apocalyptic number.

90703031 is a deficient number, since it is larger than the sum of its proper divisors (1).

90703031 is an equidigital number, since it uses as much as digits as its factorization.

90703031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 23.

The square root of 90703031 is about 9523.8138894038. The cubic root of 90703031 is about 449.3043259051.

The spelling of 90703031 in words is "ninety million, seven hundred three thousand, thirty-one".