698934131981 has 4 divisors (see below), whose sum is σ = 702446364000. Its totient is φ = 695421899964.

The previous prime is 698934131971. The next prime is 698934132019. The reversal of 698934131981 is 189131439896.

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 698934131981 - 2²² = 698929937677 is a prime.

It is a super-2 number, since 2×698934131981² (a number of 24 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 (698934131971) 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, 1756115711 + ... + 1756116108.

It is an arithmetic number, because the mean of its divisors is an integer number (175611591000).

Almost surely, 2^698934131981 is an apocalyptic number.

It is an amenable number.

698934131981 is a deficient number, since it is larger than the sum of its proper divisors (3512232019).

698934131981 is a wasteful number, since it uses less digits than its factorization.

698934131981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512232018.

The product of its digits is 10077696, while the sum is 62.

The spelling of 698934131981 in words is "six hundred ninety-eight billion, nine hundred thirty-four million, one hundred thirty-one thousand, nine hundred eighty-one".