640514097 has 24 divisors (see below), whose sum is σ = 998712000. Its totient is φ = 394355808.

The previous prime is 640514093. The next prime is 640514101. The reversal of 640514097 is 790415046.

640514097 is a `hidden beast` number, since 640 + 5 + 1 + 4 + 0 + 9 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (640514093) and next prime (640514101).

It is not a de Polignac number, because 640514097 - 2² = 640514093 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640514093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47347 + ... + 59352.

It is an arithmetic number, because the mean of its divisors is an integer number (41613000).

Almost surely, 2^640514097 is an apocalyptic number.

It is an amenable number.

640514097 is a deficient number, since it is larger than the sum of its proper divisors (358197903).

640514097 is a wasteful number, since it uses less digits than its factorization.

640514097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106757 (or 106754 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 640514097 is about 25308.3799758104. The cubic root of 640514097 is about 862.0045618412.

It can be divided in two parts, 6405 and 14097, that added together give a palindrome (20502).

The spelling of 640514097 in words is "six hundred forty million, five hundred fourteen thousand, ninety-seven".