1198478901 has 8 divisors (see below), whose sum is σ = 1618199680. Its totient is φ = 788872032.

The previous prime is 1198478899. The next prime is 1198478909. The reversal of 1198478901 is 1098748911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1198478901 - 2¹ = 1198478899 is a prime.

It is a super-2 number, since 2×1198478901² = 2872703352284335602, 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 (1198478909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2528200 + ... + 2528673.

It is an arithmetic number, because the mean of its divisors is an integer number (202274960).

Almost surely, 2^1198478901 is an apocalyptic number.

It is an amenable number.

1198478901 is a deficient number, since it is larger than the sum of its proper divisors (419720779).

1198478901 is an equidigital number, since it uses as much as digits as its factorization.

1198478901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056955.

The product of its (nonzero) digits is 145152, while the sum is 48.

The square root of 1198478901 is about 34619.0540165383. The cubic root of 1198478901 is about 1062.2093768644.

The spelling of 1198478901 in words is "one billion, one hundred ninety-eight million, four hundred seventy-eight thousand, nine hundred one".