65197390 has 32 divisors (see below), whose sum is σ = 119379744. Its totient is φ = 25633920.

The previous prime is 65197381. The next prime is 65197393. The reversal of 65197390 is 9379156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65197393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205512 + ... + 205828.

It is an arithmetic number, because the mean of its divisors is an integer number (3730617).

Almost surely, 2^65197390 is an apocalyptic number.

65197390 is a deficient number, since it is larger than the sum of its proper divisors (54182354).

65197390 is a wasteful number, since it uses less digits than its factorization.

65197390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 65197390 is about 8074.4900767788. The cubic root of 65197390 is about 402.4791651060.

The spelling of 65197390 in words is "sixty-five million, one hundred ninety-seven thousand, three hundred ninety".