91770434 has 24 divisors (see below), whose sum is σ = 164464380. Its totient is φ = 38265696.

The previous prime is 91770433. The next prime is 91770451. The reversal of 91770434 is 43407719.

It can be written as a sum of positive squares in 2 ways, for example, as 84732025 + 7038409 = 9205^2 + 2653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91770394 and 91770403.

It is not an unprimeable number, because it can be changed into a prime (91770433) 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, 9029 + ... + 16280.

Almost surely, 2^91770434 is an apocalyptic number.

91770434 is a deficient number, since it is larger than the sum of its proper divisors (72693946).

91770434 is a wasteful number, since it uses less digits than its factorization.

91770434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25362 (or 25355 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 91770434 is about 9579.6886170689. The cubic root of 91770434 is about 451.0599442121.

The spelling of 91770434 in words is "ninety-one million, seven hundred seventy thousand, four hundred thirty-four".