1540472697 has 12 divisors (see below), whose sum is σ = 2356017300. Its totient is φ = 966571008.

The previous prime is 1540472669. The next prime is 1540472701. The reversal of 1540472697 is 7962740451.

1540472697 is a `hidden beast` number, since 1 + 540 + 47 + 2 + 69 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1318343481 + 222129216 = 36309^2 + 14904^2 .

It is not a de Polignac number, because 1540472697 - 2⁷ = 1540472569 is a prime.

It is a super-2 number, since 2×1540472697² = 4746112260404907618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1540472657) 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, 5034072 + ... + 5034377.

It is an arithmetic number, because the mean of its divisors is an integer number (196334775).

Almost surely, 2^1540472697 is an apocalyptic number.

1540472697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1540472697 is a deficient number, since it is larger than the sum of its proper divisors (815544603).

1540472697 is a wasteful number, since it uses less digits than its factorization.

1540472697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068472 (or 10068469 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 1540472697 is about 39248.8559960669. The cubic root of 1540472697 is about 1154.9184920274.

The spelling of 1540472697 in words is "one billion, five hundred forty million, four hundred seventy-two thousand, six hundred ninety-seven".