1540932997 has 2 divisors, whose sum is σ = 1540932998. Its totient is φ = 1540932996.

The previous prime is 1540932973. The next prime is 1540933007. The reversal of 1540932997 is 7992390451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1229975041 + 310957956 = 35071^2 + 17634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540932997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1540932997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540932937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770466498 + 770466499.

It is an arithmetic number, because the mean of its divisors is an integer number (770466499).

Almost surely, 2^1540932997 is an apocalyptic number.

It is an amenable number.

1540932997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540932997 is an equidigital number, since it uses as much as digits as its factorization.

1540932997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 1540932997 is about 39254.7194232744. The cubic root of 1540932997 is about 1155.0335121427.

The spelling of 1540932997 in words is "one billion, five hundred forty million, nine hundred thirty-two thousand, nine hundred ninety-seven".