1377813479 has 8 divisors (see below), whose sum is σ = 1575272448. Its totient is φ = 1180511640.

The previous prime is 1377813431. The next prime is 1377813497. The reversal of 1377813479 is 9743187731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1377813479 - 2⁸ = 1377813223 is a prime.

It is a super-4 number, since 4×1377813479⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377813419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19847 + ... + 56120.

It is an arithmetic number, because the mean of its divisors is an integer number (196909056).

Almost surely, 2^1377813479 is an apocalyptic number.

1377813479 is a deficient number, since it is larger than the sum of its proper divisors (197458969).

1377813479 is an equidigital number, since it uses as much as digits as its factorization.

1377813479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78565.

The product of its digits is 889056, while the sum is 50.

The square root of 1377813479 is about 37118.9099920782. The cubic root of 1377813479 is about 1112.7479675176.

The spelling of 1377813479 in words is "one billion, three hundred seventy-seven million, eight hundred thirteen thousand, four hundred seventy-nine".