1002364991 has 4 divisors (see below), whose sum is σ = 1021277592. Its totient is φ = 983452392.

The previous prime is 1002364973. The next prime is 1002365009. The reversal of 1002364991 is 1994632001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1002364973) and next prime (1002365009).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002364991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002364691) 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, 9456221 + ... + 9456326.

It is an arithmetic number, because the mean of its divisors is an integer number (255319398).

Almost surely, 2^1002364991 is an apocalyptic number.

1002364991 is a deficient number, since it is larger than the sum of its proper divisors (18912601).

1002364991 is an equidigital number, since it uses as much as digits as its factorization.

1002364991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18912600.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1002364991 is about 31660.1483098232. The cubic root of 1002364991 is about 1000.7877096839.

Adding to 1002364991 its reverse (1994632001), we get a palindrome (2996996992).

The spelling of 1002364991 in words is "one billion, two million, three hundred sixty-four thousand, nine hundred ninety-one".