1403507997 has 12 divisors (see below), whose sum is σ = 2031810300. Its totient is φ = 933585408.

The previous prime is 1403507993. The next prime is 1403508091. The reversal of 1403507997 is 7997053041.

1403507997 is a `hidden beast` number, since 140 + 350 + 79 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 842102361 + 561405636 = 29019^2 + 23694^2 .

It is not a de Polignac number, because 1403507997 - 2² = 1403507993 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403507993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169618 + ... + 177699.

It is an arithmetic number, because the mean of its divisors is an integer number (169317525).

Almost surely, 2^1403507997 is an apocalyptic number.

It is an amenable number.

1403507997 is a deficient number, since it is larger than the sum of its proper divisors (628302303).

1403507997 is a wasteful number, since it uses less digits than its factorization.

1403507997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347772 (or 347769 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 1403507997 is about 37463.4221207834. The cubic root of 1403507997 is about 1119.6225335666.

The spelling of 1403507997 in words is "one billion, four hundred three million, five hundred seven thousand, nine hundred ninety-seven".