1421739997 has 8 divisors (see below), whose sum is σ = 1446144192. Its totient is φ = 1397457600.

The previous prime is 1421739967. The next prime is 1421740027. The reversal of 1421739997 is 7999371241.

It is an interprime number because it is at equal distance from previous prime (1421739967) and next prime (1421740027).

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

It is a cyclic number.

It is not a de Polignac number, because 1421739997 - 2¹⁹ = 1421215709 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 (1421739947) 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, 6748 + ... + 53749.

It is an arithmetic number, because the mean of its divisors is an integer number (180768024).

Almost surely, 2^1421739997 is an apocalyptic number.

It is an amenable number.

1421739997 is a deficient number, since it is larger than the sum of its proper divisors (24404195).

1421739997 is an equidigital number, since it uses as much as digits as its factorization.

1421739997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60899.

The product of its digits is 857304, while the sum is 52.

The square root of 1421739997 is about 37705.9676576533. The cubic root of 1421739997 is about 1124.4497712935.

The spelling of 1421739997 in words is "one billion, four hundred twenty-one million, seven hundred thirty-nine thousand, nine hundred ninety-seven".