91961430 has 32 divisors (see below), whose sum is σ = 240772608. Its totient is φ = 22293600.

The previous prime is 91961417. The next prime is 91961431. The reversal of 91961430 is 3416919.

It is a super-3 number, since 3×91961430³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 91961391 and 91961400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91961431) 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, 139006 + ... + 139665.

It is an arithmetic number, because the mean of its divisors is an integer number (7524144).

Almost surely, 2^91961430 is an apocalyptic number.

91961430 is an abundant number, since it is smaller than the sum of its proper divisors (148811178).

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

91961430 is a wasteful number, since it uses less digits than its factorization.

91961430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278692.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 91961430 is about 9589.6522356131. The cubic root of 91961430 is about 451.3726482197.

The spelling of 91961430 in words is "ninety-one million, nine hundred sixty-one thousand, four hundred thirty".