10698991 has 4 divisors (see below), whose sum is σ = 10959984. Its totient is φ = 10438000.

The previous prime is 10698983. The next prime is 10699019. The reversal of 10698991 is 19989601.

10698991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19989601 = 2411 ⋅8291.

It is a cyclic number.

It is not a de Polignac number, because 10698991 - 2³ = 10698983 is a prime.

It is a super-2 number, since 2×10698991² = 228936816836162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10698911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130435 + ... + 130516.

It is an arithmetic number, because the mean of its divisors is an integer number (2739996).

Almost surely, 2^10698991 is an apocalyptic number.

10698991 is a deficient number, since it is larger than the sum of its proper divisors (260993).

10698991 is an equidigital number, since it uses as much as digits as its factorization.

10698991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260992.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 10698991 is about 3270.9312129728. The cubic root of 10698991 is about 220.3506186009.

The spelling of 10698991 in words is "ten million, six hundred ninety-eight thousand, nine hundred ninety-one".