607451981 has 2 divisors, whose sum is σ = 607451982. Its totient is φ = 607451980.

The previous prime is 607451963. The next prime is 607451987. The reversal of 607451981 is 189154706.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375041956 + 232410025 = 19366^2 + 15245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-607451981 is a prime.

It is a super-2 number, since 2×607451981² = 737995818441648722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (607451987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303725990 + 303725991.

It is an arithmetic number, because the mean of its divisors is an integer number (303725991).

Almost surely, 2^607451981 is an apocalyptic number.

It is an amenable number.

607451981 is a deficient number, since it is larger than the sum of its proper divisors (1).

607451981 is an equidigital number, since it uses as much as digits as its factorization.

607451981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 607451981 is about 24646.5409540568. The cubic root of 607451981 is about 846.9101105363.

It can be divided in two parts, 60745 and 1981, that added together give a palindrome (62726).

The spelling of 607451981 in words is "six hundred seven million, four hundred fifty-one thousand, nine hundred eighty-one".