91033970 has 8 divisors (see below), whose sum is σ = 163861164. Its totient is φ = 36413584.

The previous prime is 91033961. The next prime is 91033973. The reversal of 91033970 is 7933019.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86843761 + 4190209 = 9319^2 + 2047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91033973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4551689 + ... + 4551708.

Almost surely, 2^91033970 is an apocalyptic number.

91033970 is a deficient number, since it is larger than the sum of its proper divisors (72827194).

91033970 is a wasteful number, since it uses less digits than its factorization.

91033970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9103404.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 91033970 is about 9541.1723598308. The cubic root of 91033970 is about 449.8501064551.

Adding to 91033970 its reverse (7933019), we get a palindrome (98966989).

The spelling of 91033970 in words is "ninety-one million, thirty-three thousand, nine hundred seventy".