1540072297 has 2 divisors, whose sum is σ = 1540072298. Its totient is φ = 1540072296.

The previous prime is 1540072291. The next prime is 1540072333. The reversal of 1540072297 is 7922700451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1529122816 + 10949481 = 39104^2 + 3309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540072297 - 2⁷ = 1540072169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540072291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770036148 + 770036149.

It is an arithmetic number, because the mean of its divisors is an integer number (770036149).

Almost surely, 2^1540072297 is an apocalyptic number.

It is an amenable number.

1540072297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540072297 is an equidigital number, since it uses as much as digits as its factorization.

1540072297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 1540072297 is about 39243.7548789613. The cubic root of 1540072297 is about 1154.8184211345.

The spelling of 1540072297 in words is "one billion, five hundred forty million, seventy-two thousand, two hundred ninety-seven".