45731387 has 4 divisors (see below), whose sum is σ = 49249200. Its totient is φ = 42213576.

The previous prime is 45731381. The next prime is 45731401. The reversal of 45731387 is 78313754.

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

It is a cyclic number.

It is not a de Polignac number, because 45731387 - 2¹² = 45727291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45731387.

It is not an unprimeable number, because it can be changed into a prime (45731381) 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, 1758887 + ... + 1758912.

It is an arithmetic number, because the mean of its divisors is an integer number (12312300).

Almost surely, 2^45731387 is an apocalyptic number.

45731387 is a deficient number, since it is larger than the sum of its proper divisors (3517813).

45731387 is a wasteful number, since it uses less digits than its factorization.

45731387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517812.

The product of its digits is 70560, while the sum is 38.

The square root of 45731387 is about 6762.4985767096. The cubic root of 45731387 is about 357.6059952709.

The spelling of 45731387 in words is "forty-five million, seven hundred thirty-one thousand, three hundred eighty-seven".