91012010 has 16 divisors (see below), whose sum is σ = 165113856. Its totient is φ = 36117648.

The previous prime is 91011979. The next prime is 91012039. The reversal of 91012010 is 1021019.

It is a super-4 number, since 4×91012010⁴ (a number of 33 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34562 + ... + 37101.

It is an arithmetic number, because the mean of its divisors is an integer number (10319616).

Almost surely, 2^91012010 is an apocalyptic number.

91012010 is a deficient number, since it is larger than the sum of its proper divisors (74101846).

91012010 is a wasteful number, since it uses less digits than its factorization.

91012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71797.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 91012010 is about 9540.0214884454. The cubic root of 91012010 is about 449.8139313043.

Adding to 91012010 its reverse (1021019), we get a palindrome (92033029).

It can be divided in two parts, 9101 and 2010, that added together give a palindrome (11111).

The spelling of 91012010 in words is "ninety-one million, twelve thousand, ten".