91229470 has 32 divisors (see below), whose sum is σ = 167213088. Its totient is φ = 35831808.

The previous prime is 91229461. The next prime is 91229471. The reversal of 91229470 is 7492219.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91229471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157822 + ... + 158398.

It is an arithmetic number, because the mean of its divisors is an integer number (5225409).

Almost surely, 2^91229470 is an apocalyptic number.

91229470 is a deficient number, since it is larger than the sum of its proper divisors (75983618).

91229470 is a wasteful number, since it uses less digits than its factorization.

91229470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 91229470 is about 9551.4119375096. The cubic root of 91229470 is about 450.1719014030.

The spelling of 91229470 in words is "ninety-one million, two hundred twenty-nine thousand, four hundred seventy".