39780149397 has 4 divisors (see below), whose sum is σ = 53040199200. Its totient is φ = 26520099596.

The previous prime is 39780149389. The next prime is 39780149443. The reversal of 39780149397 is 79394108793.

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 not a de Polignac number, because 39780149397 - 2³ = 39780149389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39780149397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39780149797) 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, 6630024897 + ... + 6630024902.

It is an arithmetic number, because the mean of its divisors is an integer number (13260049800).

Almost surely, 2^39780149397 is an apocalyptic number.

It is an amenable number.

39780149397 is a deficient number, since it is larger than the sum of its proper divisors (13260049803).

39780149397 is a wasteful number, since it uses less digits than its factorization.

39780149397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13260049802.

The product of its (nonzero) digits is 10287648, while the sum is 60.

The spelling of 39780149397 in words is "thirty-nine billion, seven hundred eighty million, one hundred forty-nine thousand, three hundred ninety-seven".