1971953698 has 32 divisors (see below), whose sum is σ = 3503832192. Its totient is φ = 827378640.

The previous prime is 1971953693. The next prime is 1971953699. The reversal of 1971953698 is 8963591791.

It is not an unprimeable number, because it can be changed into a prime (1971953693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6115 + ... + 63097.

It is an arithmetic number, because the mean of its divisors is an integer number (109494756).

Almost surely, 2^1971953698 is an apocalyptic number.

1971953698 is a deficient number, since it is larger than the sum of its proper divisors (1531878494).

1971953698 is a wasteful number, since it uses less digits than its factorization.

1971953698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57031 (or 57009 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 58.

The square root of 1971953698 is about 44406.6852849883. The cubic root of 1971953698 is about 1254.0039499209.

The spelling of 1971953698 in words is "one billion, nine hundred seventy-one million, nine hundred fifty-three thousand, six hundred ninety-eight".