694400091 has 32 divisors (see below), whose sum is σ = 1157787648. Its totient is φ = 359646240.

The previous prime is 694400089. The next prime is 694400101. The reversal of 694400091 is 190004496.

It is not a de Polignac number, because 694400091 - 2¹ = 694400089 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (694400891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75826 + ... + 84488.

It is an arithmetic number, because the mean of its divisors is an integer number (36180864).

Almost surely, 2^694400091 is an apocalyptic number.

694400091 is a deficient number, since it is larger than the sum of its proper divisors (463387557).

694400091 is a wasteful number, since it uses less digits than its factorization.

694400091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 694400091 is about 26351.4722738598. The cubic root of 694400091 is about 885.5299542237.

The spelling of 694400091 in words is "six hundred ninety-four million, four hundred thousand, ninety-one".