1401429977 has 4 divisors (see below), whose sum is σ = 1401834000. Its totient is φ = 1401025956.

The previous prime is 1401429937. The next prime is 1401430001. The reversal of 1401429977 is 7799241041.

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 1401429977 - 2¹⁶ = 1401364441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401429917) 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, 196763 + ... + 203760.

It is an arithmetic number, because the mean of its divisors is an integer number (350458500).

Almost surely, 2^1401429977 is an apocalyptic number.

It is an amenable number.

1401429977 is a deficient number, since it is larger than the sum of its proper divisors (404023).

1401429977 is an equidigital number, since it uses as much as digits as its factorization.

1401429977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404022.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1401429977 is about 37435.6778621678. The cubic root of 1401429977 is about 1119.0696932993.

The spelling of 1401429977 in words is "one billion, four hundred one million, four hundred twenty-nine thousand, nine hundred seventy-seven".