91698051 has 8 divisors (see below), whose sum is σ = 129456144. Its totient is φ = 57536000.

The previous prime is 91698049. The next prime is 91698053. The reversal of 91698051 is 15089619.

It is an interprime number because it is at equal distance from previous prime (91698049) and next prime (91698053).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91698051 - 2¹ = 91698049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91698053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 898950 + ... + 899051.

It is an arithmetic number, because the mean of its divisors is an integer number (16182018).

Almost surely, 2^91698051 is an apocalyptic number.

91698051 is a deficient number, since it is larger than the sum of its proper divisors (37758093).

91698051 is a wasteful number, since it uses less digits than its factorization.

91698051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798021.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 91698051 is about 9575.9099306541. The cubic root of 91698051 is about 450.9413233660.

The spelling of 91698051 in words is "ninety-one million, six hundred ninety-eight thousand, fifty-one".