1455989743 has 4 divisors (see below), whose sum is σ = 1567988968. Its totient is φ = 1343990520.

The previous prime is 1455989737. The next prime is 1455989771. The reversal of 1455989743 is 3479895541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3479895541 = 41 ⋅84875501.

It is a cyclic number.

It is not a de Polignac number, because 1455989743 - 2⁹ = 1455989231 is a prime.

It is a super-2 number, since 2×1455989743² = 4239812263442412098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1455989713) 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, 55999593 + ... + 55999618.

It is an arithmetic number, because the mean of its divisors is an integer number (391997242).

Almost surely, 2^1455989743 is an apocalyptic number.

1455989743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1455989743 is a deficient number, since it is larger than the sum of its proper divisors (111999225).

1455989743 is a wasteful number, since it uses less digits than its factorization.

1455989743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111999224.

The product of its digits is 5443200, while the sum is 55.

The square root of 1455989743 is about 38157.4336532215. The cubic root of 1455989743 is about 1133.4075601231.

The spelling of 1455989743 in words is "one billion, four hundred fifty-five million, nine hundred eighty-nine thousand, seven hundred forty-three".