91061400 has 48 divisors (see below), whose sum is σ = 282292200. Its totient is φ = 24282880.

The previous prime is 91061371. The next prime is 91061407. The reversal of 91061400 is 416019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91061407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75285 + ... + 76484.

Almost surely, 2^91061400 is an apocalyptic number.

It is an amenable number.

91061400 is an abundant number, since it is smaller than the sum of its proper divisors (191230800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91061400 is a wasteful number, since it uses less digits than its factorization.

91061400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151788 (or 151779 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 91061400 is about 9542.6097059452. The cubic root of 91061400 is about 449.8952842763.

Adding to 91061400 its reverse (416019), we get a palindrome (91477419).

The spelling of 91061400 in words is "ninety-one million, sixty-one thousand, four hundred".