387740497 has 4 divisors (see below), whose sum is σ = 387781696. Its totient is φ = 387699300.

The previous prime is 387740489. The next prime is 387740557. The reversal of 387740497 is 794047783.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 794047783 = 59 ⋅13458437.

It is a cyclic number.

It is not a de Polignac number, because 387740497 - 2³ = 387740489 is a prime.

It is a super-4 number, since 4×387740497⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387740497.

It is not an unprimeable number, because it can be changed into a prime (387740407) 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, 1228 + ... + 27874.

It is an arithmetic number, because the mean of its divisors is an integer number (96945424).

Almost surely, 2^387740497 is an apocalyptic number.

It is an amenable number.

387740497 is a deficient number, since it is larger than the sum of its proper divisors (41199).

387740497 is a wasteful number, since it uses less digits than its factorization.

387740497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41198.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The square root of 387740497 is about 19691.1273674211. The cubic root of 387740497 is about 729.2006619311.

The spelling of 387740497 in words is "three hundred eighty-seven million, seven hundred forty thousand, four hundred ninety-seven".