1001493651 has 4 divisors (see below), whose sum is σ = 1335324872. Its totient is φ = 667662432.

The previous prime is 1001493641. The next prime is 1001493653. The reversal of 1001493651 is 1563941001.

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

It is not a de Polignac number, because 1001493651 - 2⁶ = 1001493587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001493653) 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, 166915606 + ... + 166915611.

It is an arithmetic number, because the mean of its divisors is an integer number (333831218).

Almost surely, 2^1001493651 is an apocalyptic number.

1001493651 is a deficient number, since it is larger than the sum of its proper divisors (333831221).

1001493651 is an equidigital number, since it uses as much as digits as its factorization.

1001493651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333831220.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1001493651 is about 31646.3844854353. The cubic root of 1001493651 is about 1000.4976359840.

The spelling of 1001493651 in words is "one billion, one million, four hundred ninety-three thousand, six hundred fifty-one".