1447991701 has 4 divisors (see below), whose sum is σ = 1559375692. Its totient is φ = 1336607712.

The previous prime is 1447991687. The next prime is 1447991717. The reversal of 1447991701 is 1071997441.

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

It can be written as a sum of positive squares in 2 ways, for example, as 330694225 + 1117297476 = 18185^2 + 33426^2 .

It is a cyclic number.

It is not a de Polignac number, because 1447991701 - 2⁵ = 1447991669 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 (1447991791) 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, 55691976 + ... + 55692001.

It is an arithmetic number, because the mean of its divisors is an integer number (389843923).

Almost surely, 2^1447991701 is an apocalyptic number.

It is an amenable number.

1447991701 is a deficient number, since it is larger than the sum of its proper divisors (111383991).

1447991701 is a wasteful number, since it uses less digits than its factorization.

1447991701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111383990.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 1447991701 is about 38052.4861342856. The cubic root of 1447991701 is about 1131.3284038086.

The spelling of 1447991701 in words is "one billion, four hundred forty-seven million, nine hundred ninety-one thousand, seven hundred one".