1385025077 has 4 divisors (see below), whose sum is σ = 1402557120. Its totient is φ = 1367493036.

The previous prime is 1385025049. The next prime is 1385025079. The reversal of 1385025077 is 7705205831.

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 1385025077 - 2²⁶ = 1317916213 is a prime.

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 1385025077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385025079) 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, 8765903 + ... + 8766060.

It is an arithmetic number, because the mean of its divisors is an integer number (350639280).

Almost surely, 2^1385025077 is an apocalyptic number.

It is an amenable number.

1385025077 is a deficient number, since it is larger than the sum of its proper divisors (17532043).

1385025077 is an equidigital number, since it uses as much as digits as its factorization.

1385025077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17532042.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 1385025077 is about 37215.9250456038. The cubic root of 1385025077 is about 1114.6859973649.

The spelling of 1385025077 in words is "one billion, three hundred eighty-five million, twenty-five thousand, seventy-seven".