65402397 has 20 divisors (see below), whose sum is σ = 97922880. Its totient is φ = 43502184.

The previous prime is 65402387. The next prime is 65402437. The reversal of 65402397 is 79320456.

65402397 is a `hidden beast` number, since 6 + 540 + 23 + 97 = 666.

It is not a de Polignac number, because 65402397 - 2¹⁶ = 65336861 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65402357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57678 + ... + 58800.

It is an arithmetic number, because the mean of its divisors is an integer number (4896144).

Almost surely, 2^65402397 is an apocalyptic number.

It is an amenable number.

65402397 is a deficient number, since it is larger than the sum of its proper divisors (32520483).

65402397 is a wasteful number, since it uses less digits than its factorization.

65402397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854 (or 1845 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 65402397 is about 8087.1748466322. The cubic root of 65402397 is about 402.9005762199.

The spelling of 65402397 in words is "sixty-five million, four hundred two thousand, three hundred ninety-seven".