1504978897 has 2 divisors, whose sum is σ = 1504978898. Its totient is φ = 1504978896.

The previous prime is 1504978879. The next prime is 1504978913. The reversal of 1504978897 is 7988794051.

Together with previous prime (1504978879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755095441 + 749883456 = 27479^2 + 27384^2 .

It is a cyclic number.

It is not a de Polignac number, because 1504978897 - 2¹¹ = 1504976849 is a prime.

It is a super-2 number, since 2×1504978897² = 4529922960830673218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1504978597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752489448 + 752489449.

It is an arithmetic number, because the mean of its divisors is an integer number (752489449).

Almost surely, 2^1504978897 is an apocalyptic number.

It is an amenable number.

1504978897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1504978897 is an equidigital number, since it uses as much as digits as its factorization.

1504978897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The square root of 1504978897 is about 38794.0574959619. The cubic root of 1504978897 is about 1145.9793803213.

The spelling of 1504978897 in words is "one billion, five hundred four million, nine hundred seventy-eight thousand, eight hundred ninety-seven".