97420157109 has 80 divisors (see below), whose sum is σ = 168292213056. Its totient is φ = 55505088000.

The previous prime is 97420157101. The next prime is 97420157137. The reversal of 97420157109 is 90175102479.

97420157109 is a `hidden beast` number, since 9 + 74 + 2 + 0 + 1 + 571 + 0 + 9 = 666.

It is not a de Polignac number, because 97420157109 - 2³ = 97420157101 is a prime.

It is a super-2 number, since 2×97420157109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97420157101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 15098334 + ... + 15104784.

Almost surely, 2^97420157109 is an apocalyptic number.

97420157109 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

97420157109 is a deficient number, since it is larger than the sum of its proper divisors (70872055947).

97420157109 is a wasteful number, since it uses less digits than its factorization.

97420157109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7488 (or 7479 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 97420157109 in words is "ninety-seven billion, four hundred twenty million, one hundred fifty-seven thousand, one hundred nine".