387774949 has 4 divisors (see below), whose sum is σ = 393236640. Its totient is φ = 382313260.

The previous prime is 387774901. The next prime is 387774967. The reversal of 387774949 is 949477783.

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 an emirpimes, since its reverse is a distinct semiprime: 949477783 = 587 ⋅1617509.

It is a cyclic number.

It is not a de Polignac number, because 387774949 - 2²¹ = 385677797 is a prime.

It is a super-2 number, since 2×387774949² = 300738822143905202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387774893 and 387774902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387774349) 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, 2730739 + ... + 2730880.

It is an arithmetic number, because the mean of its divisors is an integer number (98309160).

Almost surely, 2^387774949 is an apocalyptic number.

It is an amenable number.

387774949 is a deficient number, since it is larger than the sum of its proper divisors (5461691).

387774949 is an equidigital number, since it uses as much as digits as its factorization.

387774949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5461690.

The product of its digits is 10668672, while the sum is 58.

The square root of 387774949 is about 19692.0021582367. The cubic root of 387774949 is about 729.2222585723. Note that the first 4 decimals are identical.

The spelling of 387774949 in words is "three hundred eighty-seven million, seven hundred seventy-four thousand, nine hundred forty-nine".