2481491387 has 4 divisors (see below), whose sum is σ = 2481999360. Its totient is φ = 2480983416.

The previous prime is 2481491359. The next prime is 2481491437. The reversal of 2481491387 is 7831941842.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2481491387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2481494387) 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, 246587 + ... + 256452.

It is an arithmetic number, because the mean of its divisors is an integer number (620499840).

Almost surely, 2^2481491387 is an apocalyptic number.

2481491387 is a deficient number, since it is larger than the sum of its proper divisors (507973).

2481491387 is an equidigital number, since it uses as much as digits as its factorization.

2481491387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507972.

The product of its digits is 387072, while the sum is 47.

The square root of 2481491387 is about 49814.5700272521. The cubic root of 2481491387 is about 1353.8511682340.

The spelling of 2481491387 in words is "two billion, four hundred eighty-one million, four hundred ninety-one thousand, three hundred eighty-seven".