735049981 has 4 divisors (see below), whose sum is σ = 735191964. Its totient is φ = 734908000.

The previous prime is 735049949. The next prime is 735050027. The reversal of 735049981 is 189940537.

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: 189940537 = 2459 ⋅77243.

It can be written as a sum of positive squares in 2 ways, for example, as 229249881 + 505800100 = 15141^2 + 22490^2 .

It is a cyclic number.

It is not a de Polignac number, because 735049981 - 2⁵ = 735049949 is a prime.

It is a super-2 number, since 2×735049981² = 1080596949136200722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (735049481) 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, 62920 + ... + 73681.

It is an arithmetic number, because the mean of its divisors is an integer number (183797991).

Almost surely, 2^735049981 is an apocalyptic number.

It is an amenable number.

735049981 is a deficient number, since it is larger than the sum of its proper divisors (141983).

735049981 is a wasteful number, since it uses less digits than its factorization.

735049981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141982.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 735049981 is about 27111.8051962609. The cubic root of 735049981 is about 902.4828483324.

The spelling of 735049981 in words is "seven hundred thirty-five million, forty-nine thousand, nine hundred eighty-one".