1427997077 has 16 divisors (see below), whose sum is σ = 1586012400. Its totient is φ = 1277299200.

The previous prime is 1427997031. The next prime is 1427997089. The reversal of 1427997077 is 7707997241.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 158785201 + 1269211876 = 12601^2 + 35626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427997077 - 2¹⁴ = 1427980693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427997097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70427 + ... + 88407.

It is an arithmetic number, because the mean of its divisors is an integer number (99125775).

Almost surely, 2^1427997077 is an apocalyptic number.

It is an amenable number.

1427997077 is a deficient number, since it is larger than the sum of its proper divisors (158015323).

1427997077 is a wasteful number, since it uses less digits than its factorization.

1427997077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18184.

The product of its (nonzero) digits is 1555848, while the sum is 53.

The square root of 1427997077 is about 37788.8485799713. The cubic root of 1427997077 is about 1126.0969256889.

The spelling of 1427997077 in words is "one billion, four hundred twenty-seven million, nine hundred ninety-seven thousand, seventy-seven".