1377640401 has 4 divisors (see below), whose sum is σ = 1836853872. Its totient is φ = 918426932.

The previous prime is 1377640379. The next prime is 1377640421. The reversal of 1377640401 is 1040467731.

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 1377640401 - 2¹⁰ = 1377639377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1377640421) 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, 229606731 + ... + 229606736.

It is an arithmetic number, because the mean of its divisors is an integer number (459213468).

Almost surely, 2^1377640401 is an apocalyptic number.

It is an amenable number.

1377640401 is a deficient number, since it is larger than the sum of its proper divisors (459213471).

1377640401 is an equidigital number, since it uses as much as digits as its factorization.

1377640401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459213470.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1377640401 is about 37116.5785195780. The cubic root of 1377640401 is about 1112.7013718885.

The spelling of 1377640401 in words is "one billion, three hundred seventy-seven million, six hundred forty thousand, four hundred one".