25628969 has 4 divisors (see below), whose sum is σ = 26743296. Its totient is φ = 24514644.

The previous prime is 25628947. The next prime is 25628983. The reversal of 25628969 is 96982652.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-25628969 is a prime.

It is a super-2 number, since 2×25628969² = 1313688104005922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25628269) 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, 557129 + ... + 557174.

It is an arithmetic number, because the mean of its divisors is an integer number (6685824).

Almost surely, 2^25628969 is an apocalyptic number.

It is an amenable number.

25628969 is a deficient number, since it is larger than the sum of its proper divisors (1114327).

25628969 is a wasteful number, since it uses less digits than its factorization.

25628969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114326.

The product of its digits is 466560, while the sum is 47.

The square root of 25628969 is about 5062.5061975271. The cubic root of 25628969 is about 294.8336474724.

The spelling of 25628969 in words is "twenty-five million, six hundred twenty-eight thousand, nine hundred sixty-nine".