2505401897 has 4 divisors (see below), whose sum is σ = 2528816976. Its totient is φ = 2481986820.

The previous prime is 2505401879. The next prime is 2505401903. The reversal of 2505401897 is 7981045052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2505401897 - 2¹² = 2505397801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505401597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11707379 + ... + 11707592.

It is an arithmetic number, because the mean of its divisors is an integer number (632204244).

Almost surely, 2^2505401897 is an apocalyptic number.

It is an amenable number.

2505401897 is a deficient number, since it is larger than the sum of its proper divisors (23415079).

2505401897 is a wasteful number, since it uses less digits than its factorization.

2505401897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23415078.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 2505401897 is about 50053.9898209923. The cubic root of 2505401897 is about 1358.1856386953.

The spelling of 2505401897 in words is "two billion, five hundred five million, four hundred one thousand, eight hundred ninety-seven".