1454399981 has 2 divisors, whose sum is σ = 1454399982. Its totient is φ = 1454399980.

The previous prime is 1454399927. The next prime is 1454399983. The reversal of 1454399981 is 1899934541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1454201956 + 198025 = 38134^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1454399981 - 2²² = 1450205677 is a prime.

It is a super-2 number, since 2×1454399981² = 4230558609465600722, which contains 22 as substring.

Together with 1454399983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1454399983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727199990 + 727199991.

It is an arithmetic number, because the mean of its divisors is an integer number (727199991).

Almost surely, 2^1454399981 is an apocalyptic number.

It is an amenable number.

1454399981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1454399981 is an equidigital number, since it uses as much as digits as its factorization.

1454399981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 53.

The square root of 1454399981 is about 38136.5963478651. The cubic root of 1454399981 is about 1132.9948959370.

The spelling of 1454399981 in words is "one billion, four hundred fifty-four million, three hundred ninety-nine thousand, nine hundred eighty-one".