654370981 has 4 divisors (see below), whose sum is σ = 713859264. Its totient is φ = 594882700.

The previous prime is 654370979. The next prime is 654371023. The reversal of 654370981 is 189073456.

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 654370981 - 2¹ = 654370979 is a prime.

It is a super-2 number, since 2×654370981² = 856402761549804722, 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 (654370901) 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, 29744125 + ... + 29744146.

It is an arithmetic number, because the mean of its divisors is an integer number (178464816).

Almost surely, 2^654370981 is an apocalyptic number.

It is an amenable number.

654370981 is a deficient number, since it is larger than the sum of its proper divisors (59488283).

654370981 is a wasteful number, since it uses less digits than its factorization.

654370981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59488282.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 654370981 is about 25580.6759293026. The cubic root of 654370981 is about 868.1764689836.

The spelling of 654370981 in words is "six hundred fifty-four million, three hundred seventy thousand, nine hundred eighty-one".