1377745406 has 4 divisors (see below), whose sum is σ = 2066618112. Its totient is φ = 688872702.

The previous prime is 1377745367. The next prime is 1377745459. The reversal of 1377745406 is 6045477731.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344436350 + ... + 344436353.

It is an arithmetic number, because the mean of its divisors is an integer number (516654528).

Almost surely, 2^1377745406 is an apocalyptic number.

1377745406 is a deficient number, since it is larger than the sum of its proper divisors (688872706).

1377745406 is an equidigital number, since it uses as much as digits as its factorization.

1377745406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688872705.

The product of its (nonzero) digits is 493920, while the sum is 44.

The square root of 1377745406 is about 37117.9930222527. The cubic root of 1377745406 is about 1112.7296415393.

The spelling of 1377745406 in words is "one billion, three hundred seventy-seven million, seven hundred forty-five thousand, four hundred six".