172372402 has 4 divisors (see below), whose sum is σ = 258558606. Its totient is φ = 86186200.

The previous prime is 172372393. The next prime is 172372411. The reversal of 172372402 is 204273271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204273271 = 1741 ⋅117331.

It is an interprime number because it is at equal distance from previous prime (172372393) and next prime (172372411).

It can be written as a sum of positive squares in only one way, i.e., 137100681 + 35271721 = 11709^2 + 5939^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43093099 + ... + 43093102.

Almost surely, 2^172372402 is an apocalyptic number.

172372402 is a deficient number, since it is larger than the sum of its proper divisors (86186204).

172372402 is an equidigital number, since it uses as much as digits as its factorization.

172372402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86186203.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 172372402 is about 13129.0670651041. The cubic root of 172372402 is about 556.5308513650.

The spelling of 172372402 in words is "one hundred seventy-two million, three hundred seventy-two thousand, four hundred two".