91448994 has 96 divisors (see below), whose sum is σ = 233041536. Its totient is φ = 23708160.

The previous prime is 91448969. The next prime is 91449019. The reversal of 91448994 is 49984419.

91448994 = 420² + 421² + ... + 703².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91448969) and next prime (91449019).

It is a super-2 number, since 2×91448994² = 16725837007224072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 271194 + ... + 271530.

It is an arithmetic number, because the mean of its divisors is an integer number (2427516).

Almost surely, 2^91448994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91448994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116520768).

91448994 is an abundant number, since it is smaller than the sum of its proper divisors (141592542).

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

91448994 is a wasteful number, since it uses less digits than its factorization.

91448994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 433 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 91448994 is about 9562.8967368680. The cubic root of 91448994 is about 450.5326926270.

The spelling of 91448994 in words is "ninety-one million, four hundred forty-eight thousand, nine hundred ninety-four".