742736981 has 8 divisors (see below), whose sum is σ = 849007104. Its totient is φ = 636508080.

The previous prime is 742736977. The next prime is 742736983. The reversal of 742736981 is 189637247.

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 742736981 - 2² = 742736977 is a prime.

It is a super-2 number, since 2×742736981² = 1103316445889988722, 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 (742736983) 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, 65756 + ... + 76218.

It is an arithmetic number, because the mean of its divisors is an integer number (106125888).

Almost surely, 2^742736981 is an apocalyptic number.

It is an amenable number.

742736981 is a deficient number, since it is larger than the sum of its proper divisors (106270123).

742736981 is a wasteful number, since it uses less digits than its factorization.

742736981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20611.

The product of its digits is 508032, while the sum is 47.

The square root of 742736981 is about 27253.2012981961. The cubic root of 742736981 is about 905.6179376086.

The spelling of 742736981 in words is "seven hundred forty-two million, seven hundred thirty-six thousand, nine hundred eighty-one".