7436893981 has 4 divisors (see below), whose sum is σ = 8112975264. Its totient is φ = 6760812700.

The previous prime is 7436893963. The next prime is 7436894011. The reversal of 7436893981 is 1893986347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7436893981 - 2²¹ = 7434796829 is a prime.

It is a super-2 number, since 2×7436893981² (a number of 21 digits) 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 (7436893931) 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, 338040625 + ... + 338040646.

It is an arithmetic number, because the mean of its divisors is an integer number (2028243816).

Almost surely, 2^7436893981 is an apocalyptic number.

It is an amenable number.

7436893981 is a deficient number, since it is larger than the sum of its proper divisors (676081283).

7436893981 is a wasteful number, since it uses less digits than its factorization.

7436893981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676081282.

The product of its digits is 7838208, while the sum is 58.

The square root of 7436893981 is about 86237.4279590944. The cubic root of 7436893981 is about 1951.9283121859.

The spelling of 7436893981 in words is "seven billion, four hundred thirty-six million, eight hundred ninety-three thousand, nine hundred eighty-one".