991067413 has 4 divisors (see below), whose sum is σ = 1132648480. Its totient is φ = 849486348.

The previous prime is 991067387. The next prime is 991067437. The reversal of 991067413 is 314760199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 991067413 - 2⁵ = 991067381 is a prime.

It is a super-2 number, since 2×991067413² = 1964429234221025138, 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 (991067713) 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, 70790523 + ... + 70790536.

It is an arithmetic number, because the mean of its divisors is an integer number (283162120).

Almost surely, 2^991067413 is an apocalyptic number.

It is an amenable number.

991067413 is a deficient number, since it is larger than the sum of its proper divisors (141581067).

991067413 is a wasteful number, since it uses less digits than its factorization.

991067413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141581066.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 991067413 is about 31481.2231814458. The cubic root of 991067413 is about 997.0135610610.

The spelling of 991067413 in words is "nine hundred ninety-one million, sixty-seven thousand, four hundred thirteen".