1401678477 has 6 divisors (see below), whose sum is σ = 2024646702. Its totient is φ = 934452312.

The previous prime is 1401678463. The next prime is 1401678479. The reversal of 1401678477 is 7748761041.

1401678477 is a `hidden beast` number, since 14 + 0 + 167 + 8 + 477 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1344615561 + 57062916 = 36669^2 + 7554^2 .

It is not a de Polignac number, because 1401678477 - 2⁴ = 1401678461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401678479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77871018 + ... + 77871035.

It is an arithmetic number, because the mean of its divisors is an integer number (337441117).

Almost surely, 2^1401678477 is an apocalyptic number.

It is an amenable number.

1401678477 is a deficient number, since it is larger than the sum of its proper divisors (622968225).

1401678477 is a wasteful number, since it uses less digits than its factorization.

1401678477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155742059 (or 155742056 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 1401678477 is about 37438.9967413658. The cubic root of 1401678477 is about 1119.1358334534.

The spelling of 1401678477 in words is "one billion, four hundred one million, six hundred seventy-eight thousand, four hundred seventy-seven".